CLAMP's fond of it, especially in X1999, when Fuuma licks Kamui's neck, stabs him, then kills their sister. And you know, Seishirou/Subaru, the whole of Seishirou/Subaru. See also RG Veda.
Genkaku towards Nagi in Deadman Wonderland. What with Genkaku getting turned on by Nagi killing, trying desperately to get Nagi to join the Undertakers, and getting jealous and angry at Karako for giving Nagi a Cooldown Hug. Not to mention that he tells Nagi that what he says is "cute", and that Nagi's hand has become very cute too (after Nagi's hand was cut off by Hibana) and licking the blood off of Nagi's stump of an arm. Genkaku's obsession with Nagi is eventually shown outright with Genkaku actually coming out and telling Nagi he "loved him" before attempting to kill him.
The author ended up killing off both Genkaku and Nagi. Later, Mockingbird was introduced, who has a similar sort of Blood Lust and kinky way of flirting and fighting with Ganta and Senji.
Even before then there was Minatsuki. When she first revealed her psychopathic personality to Ganta, she proclaimed that she would kill him, cut up his body, then "cum in [his] formaldehyde".
Ganta had just met Minatsuki the day before, and her (deceptive) first suggestion was, "Let's bust out of here and get married."
Gauron towards Sōsuke. Made especially clear in the novels, where he apparently had some very vile fantasies during and after their fight of killing Sōsuke and raping his corpse. And the way he "consummates" their relationship is by goading Sōsuke into killing him. Yeah, apparently scoring a home run with him involves death. Gauron is also shown to get sexual arousal from violently cutting up and killing people and breaking their spirits.
Ladd and Lua's relationship in Baccano! is filled to the brim with this: He's a shameless Ax-CrazyPsycho for Hire that expresses love by telling you that he'll Kill You Last, and she's a disturbingly serene, probably suicidal devotee longing for the day that he sneaks up behind her and murders her. It's a match made in a sadomasochist's Heaven.
Creed and Train in Black Cat - most notably in the anime. Creed is very obviously a masochist Stalker with a Crush when it comes to Train (though he can also be a sadist when it comes to dealing with others). Train, on the other hand, is absolutely disgusted with how Creed seems to keep getting a boner when he beats him up. In one scene, Train is particularly disturbed when, after fighting, Train ends up in a rather compromising position on top of Creed. Creed acts like he had an orgasm, even creepily calling out, "Oh Train, you're the best!" And then there's the time when Creed begs for Train to shoot him, because once he's shot him, they'll "be bonded forever."
Kyoko also has shades of this, though moreso in the manga.
There's also her line which suggests sexual pleasure that she has at the thought of fighting Negi after witnessing his new Badass state. "How utterly delicious he must be!" (she says with her tongue out, while blushing, and a heart in her speech bubble)
Medusa and Stein's fight in Soul Eater. Stein's the one who gets called a sadist, but both are clearly enjoying themselves to the point of this trope.
In the manga, the longer Giriko's last fight goes on with Maka, the more it descends into this. It gets to the point that you could replace "chainsaw" with "penis" and it would make just as much sense. He even pins her to a bed by her wrists and threatens to rape her at one point, only to remember that he does not have a penis anymore.
In Fullmetal Alchemist, the amusing Serial Killer Barry the Chopper will reference physical attraction in terms of how much he wants to chop someone up. For example, in a scene where he is telling the heroes about the hommunculi, he references a great desire to do this to Lust, but expresses disinterest in Envy who he describes as "too stringy".
Get Backers has the fighting between Takuma Fudou and Ban. Don't say that Fudou's "throbbing desire" to force Ban to "give his body to him" isn't an allegory for rape.
There's lots of this in Wolf Guy - Wolfen Crest. Pretty much everything that comes out of Ryuuko's mouth has to do with this trope. Kuroda takes a break from blowing up stuff (and students) to try to rape the meganekko with his gun. Fortunately, Inugami interrupts him. And now Haguro decides to up his freakiness by beating up Chiba and then kissing him, taking that opportunity to tear out his tongue, and then rape him. All because Inugami (whom Haguro is obsessed with) happened to run into him in the street earlier. Also, Haguro topped himself after Aoshika got released from her chains, with him fighting Inugami he got to slice two of Inugami's fingers off, then Haguro eats them and gets a boner for managing to injure Inugami.
Depraved Bisexual Shira from Blade of the Immortal doesn't care what gender his victims are, so long as he can get his kicks from them. And unfortunately, his fantasies are really perverted, twisted, and violent (literally raping people while he cuts them up). In earlier chapters, he outright explains that he always needs someone to keep "the part down there" happy. And then there's the newest chapter containing him, where he apparently kidnapped a young boy (Renzo), forcing him to take care of him, and rapes him.
Hisoka of Hunter × Hunter is impatiently waiting for Gon and Killua to become strong enough for them to be an enjoyable challenge in a fight at the end of which he would kill them. He also seems to get quite aroused about the whole thing too. His wording of how he can't wait to "pluck the fruit that hasn't ripened yet" doesn't help either.
This was made explicitly sexual with a Speech-Bubble Censoring incident where, while talking to the two boys, the speech bubble hiding Hisoka's modesty shifts upwards between panels.
Katekyo Hitman Reborn!: Glo Xinia had quite a bit of this going on with Chrome. Considering how during his fight with Chrome he grabbed her hard enough to cause her pain, kept getting in her face, and told her things like: "You seem to like being touched by men. Your blushing cannot betray your desires." "Give me MORE!" (after hearing her screams of pain) and "It's time to eat... that ring and you!" It's hinted he might've done something to her had Mukuro not shown up, allowing her time to escape. Also, when fighting Mukuro he comes out with this line: "Is that girl so precious to you? Then I'm going to take my share of such a precious girl right before your eyes. This could just be the best situation, don't you think? My appetite for that girl just keeps getting better!" and "Don't worry Chrome, I will take good care of you for MUKURO TO SEE!"
Depraved Homosexual Lussuria towards Ryohei. It starts getting ever so slightly disturbing when he's hitting on jail bait, and is insinuated to have necrophiliac tendencies as well (in his words his favorite bodies are the "wasted, cold, unmoving" ones). Unfortunately, Ryohei goes topless during their fight and this only serves to make Lussuria his hardcore fanboy. In fact, Lussuria actually openly ogles Ryohei's muscular physique, says that he's "just his type" and promptly decides to take him home and make him a part of his "collection" after he's kicked the shit out of him.
Hajime No Ippo: Bryan Hawk. He pretty much only cares about sex and violence. If he can't get enough violence, he needs sex to compensate for it. It's also implied that he gets sexually aroused from beating up his opponents (or at least Takamura).
Episode 20 of Black Butler features Sebastian chained to the wall and being whipped by an angel decked out in S&M gear and describing the excruciating sweetness of the pain being inflicted upon him in a seductive tone.
Grelle Sutcliffe is a chainsaw-wielding transsexual psychopath that is very forward about her attraction to Sebastian, within the same five minutes talking about both wanting to cut him into pieces and bear his child.
Air Gear: Shalott and Arthur's battle with Agito featured Albert in a S&M type relationship with Shalott and both of them getting aroused and excited while beating up Agito and at the thought of killing him. One scene worth mentioning was the one where Arthur caressed the back of Agito's head while pelvic thrusting against him and nibbling on his ear before stabbing him. Another scene worth mentioning was the one where Shalott kicked Agito to the ground before straddling him and threatening to tear out his teeth before saying he could "have a lick" if he wants.
Sakura Gari features this with Katsuragi's rape and torture of Masataka.
The yaoi manga Under Grand Hotel features this, as things like Prison Rape are common. The most notable one would have to be Swordfish raping his lover Sen to almost death.
And in the first few scenes we see Lain Brody he gives Sen a blowjob, strips him, drugs him and outright molests him as he's drugged (including telling him "No way in hell am I letting Swordfish kill you. Because he doesn't love you. I'm the only one that can kill you."), rapes him with a mop handle, ties him up and hides him in a dryer. And when Swordfish finds Sen he gives him CPR. Lain responds to this by stabbing Fish in the arm with a fork and tries to stab him again while screaming at him, "Get off of Sen! He belongs to me!" Immediately after that Lain is shot and killed by security guards.
Alucard of Hellsing enjoys doing something of the sort with all his victims/enemies. Special mention goes to his "battle" with Rip Van Winkle. It didn't help that in the manga, it's drawn pretty much exactly like a hentai scene, down to the ridiculously intense blush on Rip's cheeks when Alucard drinks her blood. And her constant wriggling and gasping under his hands as he slowly inserts her musket through her body.
And there's also Jan Valentine wanting to rape, kill and rape Integra again (in that order).
Alucard's relationship with Integra can also be interpreted as this. He is excited by her resolve and will for battle, and he always impales his victims when she watches, once even asking if it 'excited' her.
D.Gray-Man has Tyki Mikk acting rather excited at the thought of killing Allen. Some notable scenes include Tyki "killing" Allen (which resembled a sort of "violation," with Tyki sticking his hand into Allen), the suggestive dialogue with Tyki telling Allen, "Don't be so cold, boy. An Exorcist made a Noah strip down to his underwear. Was that the first time you did it? Do you think it was destiny for it to be us?" and Tyki seeming miffed when Allen tells him that he'd done it to many people before. During their fight later, there's another Does This Remind You of Anything? moment of this nature with Tyki telling Allen, "This is giving me the thrills. I'll break you, one more time, with this hand!"
In Mirai Nikki immediately after Yuno and Yukki have sex Yuno grabs her axe and pursues Yukki with it while both are still in their underwear.
In one scene Paprika is held captive in her dream by her Stalker with a Crush Osanai. Some brief fondling occurs and then Osanai pushes his hand under her skin which causes Paprika a lot of pain and withdraws Chiba the naked secret-identity of Paprika, but before further molesting can take place his boss tries to kill Paprika/Chiba by wrapping her in his vines and attempts to suffocate her by sticking the vines down her throat.
Peacemaker Kurogane: The old merchant Yamatoya who picked up Suzu off the street entirely for the purpose of raping him meets his end when Suzu brutally slaughters him in revenge for being raped right after Yamatoya spent a few moments fondling him.
The magnificent fight between Casshern and Sophita in episode 4 of Casshern Sins is quite obviously this, what with Sophita proclaiming her love for Casshern with every other swing of her sword. The look on her face as she slowly impales him is pretty orgasmic.
Trigun: The end of the first Trigun manga dares you to see Knives 'rebirth' scene and not to think of anything involving gynaecology or rape. It actually seems to involve Death by Childbirth. Then it gets worse when Knives grabs Vash and forces him to deploy his Angel Arm. While standing nude behind him and obviously enjoying his pain very, very much — which, by the way, isn't the only time he goes full frontal. It's even more disturbing when you know that men who get raped anally by other men get an erection. And that it's his twin brother, of course.
Let Dai: In the first few volumes, Dai and and Jaehee spend as much time hurting each other as they do treating each other romantically. Dai seems to be under the illusion that severely beating Jaehee, tying him to train tracks and then stealing his wallet means he loves him. Jaehee doesn't exactly agree.
Beelzebub: Yolda aims to kill Oga one minute, then kisses him the next. She also renders Aoi unconscious by caressing her cheek.
Madoka Kei from Star Driver. Even when you consider that it involves playing around with awesome giant robots in a Scenery Porn-eriffic alternate reality, she enjoys Cybody combat way too much. Episode 21 nearly took it Up to Eleven.
Yami Marik from Yu-Gi-Oh! is a bit like this - having been created by the normal Marik as a mechanism to cope with the pain of getting these ancient egyptian hieroglyphs carved into his back, Yami Marik is a masochist who likes to set up Shadow Games that cause as much pain as possible. It's implied that he gets off on it to a degree, and even worse, that he assumes his opponants are as well...
High School Of The Dead: Saeko really gets into fighting them after Takashi accepts her for the repressed Blood Knight she is and grants her a real sword. Complete with still frame of her in combat screaming "Yes!" superimposed with the text "I'm wet!".
Like the above example, Hidan from Naruto is a bit like this as well. His whole religion (Jashin) is about worshiping his god by causing pain to himself. His jutsu is an extension of that, ingesting another person's blood and then injuring himself to injure the other person. His dialogue and expressions really accurately show you how much he's getting off on the pain. It's made even more obvious in the anime.
House of Five Leaves: In the beginning of the story you never know if Yaichi is going to shiv Masa... or kiss him.
Occurs several times in Perfect Blue like when Mima is raped at a club and when she attacks a guy, stabbing him to death and the scene switches back and forth between that scene and another scene where she's getting photographed naked. And at the end she's stripped naked and almost raped and killed by Me-Mania but Mima knocks him out by slamming a hammer into the side of his head.
A half human half spider hybrid appears in the first OVA of Angel's Feather. When he appears he wraps Shou up in his web, caresses him, gets close to his face, sticks his finger in his mouth which causes Shou to blush, and licks him before trying to murder him by penetrating his body with his pincher.
In A Cruel God Reigns Greg seems to really get off on the fact that before he rapes him, he usually beats Jeremy bloody. When Jeremy tries to not come home from boarding school over the weekends, Greg lashes out and says that since he hasn't come home to be his Sex Slave, he's had to physically restrain himself from hitting Sandra- significant in that this is the first time Greg beats Jeremy. Later on, Jeremy tells Ian during a moment of Intimate Psychotherapy that he wants Ian to hurt him while he is doing it.
Jeremy: I'm breaking into pieces! Destroy me more, more! Break me! Kill me!
Bleach gives us Bambietta of the Stern Ritter. She deals with irritation by seducing/propositioning a subordinate and then cutting him in half.
Yachiru's enjoyment of watching Kenpachi fight may or may not be this. It's hard to tell, considering Yachiru's age, but at one point during Kenpachi's fight with Nnoitora she actually licks her lips.
Kenpachi himself seems to enjoy the adrenaline rush of battle a little too much. Possibly justified as Kenpachi isn't a deep thinker, and may not be able to differentiate one type of arousal from another.
This (NSFW) response to a Pokemon kink meme prompt contains, among other things, a scene in which Cyrus (yes, thatCyrus) manually rapes Cynthia while forcing her to watch footage of him torturing and killing Lucian. Cynthia even has an orgasm while watching Lucian die!
Harmony Theory: Charisma is sometimes turned on by the idea of others being injured.
Rosario Vampire: Brightest Darkness Act II: In chapter 32, the scenes of Moka, Mizore, and Kurumu consummating their relationships with Tsukune, Dark, and Rason, respectively, are intercut with ones of Yukari and Kokoa sparring outside.
A recurring theme in the Sachs and Violens miniseries.
This is one of the main themes of Watchmen. Almost every character has some kind of fetish - Silhouette and Hooded Justice were implied to be homosexual S&M practitioners, The Comedian and arguably Silk Spectre I apparently has a thing for sexual violence, and Nite Owl I discusses it at length in his book — in fact, the only character you might say is "innocent" is the naked guy with the big blue dong.
This is most clearly exemplified in the relationship between Silk Spectre II and Nite Owl II — they share their first kiss after beating up some thugs in an alleyway, but they aren't physically able to consummate their relationship until they both go out on a rescue mission in Nite Owl's airship, in full costume.
Also used in The League of Extraordinary Gentlemen. With Alan and Mina screwing for the first time in a cottage while Mr. Hyde works out his pent up aggression on a captured Martian tripod
Batman: In the recent "Cacophony" mini series the Joker's stated dreams are to humiliate Batman, kill him, and then violate his corpse sexually.
Savage Dragon has had plenty of T along with bloody violence. The women have the Most Common Superpower and the violence ranges from Black Comedy to horror, depending on Erik Larsen's mood. In fact, there was a Dragon miniseries called Sex and Violence.
There was an X-Force miniseries titled "Sex & Violence". It was collected in a trade paperback by the same name.
During the Secret Six series, Catman and his ex Cheshire are duking it out alongside their respective teams. In the middle of the fight, Cheshire suddenly demands that Catman make love to her... and Catman actually considers it.
The first sex scene in Sex Criminals is Suzie and Jon trying to enter The Quiet to escape from their latest robbery.
Videodrome has a special film that causes people to hallucinate bizarre mixtures of erotic and horrifically violent content involving a woman (named "Nicki") who is seen being tortured to death in the film. For example, at the request Nicki a man pulls a gun from a vagina-like cavity in his stomach. The gun fuses to his hand, then He then makes sexual thrusting with the gun-hand into his stomach!
The point of the title creatures of Alien. In order to reproduce, they have to impregnate another organism, and their larvae will then murder the host trying to escape. Alien (1979) also intentionally features many disturbing sexual motifs. HR Giger himself claims that Alien was an attempt to personify the fear of rape.
The Pierce Brosnan Bond movies also feature these on at least two occasions; First, we have Xenia Onatopp versus Bond in the steam room/sauna/pool area of his hotel during GoldenEye; she tries to crush him to death with her thighs, but there are signs that both are clearly enjoying the moment; Onatopp enjoys it so much that her toes visibly curl and she unleashes loud screams. There's also Bond being tortured by Elektra King during the penultimate confrontation of The World Is Not Enough, who indulges in kissing and taunting Bond as she gradually breaks his neck.
Sex and death are always closely related themes in the films of Alfred Hitchcock, as the page quote indicates. It's probably most obvious in Rope, where the first line of dialogue (after our Villain Protagonists have just murdered a classmate) is "Don't open the curtains. Let's... stay like this for a while." Promptly followed by the lighting of cigarettes after they conceal the corpse.
A scene in Empire of the Sun had a couple quietly making love whilst the bombs went on outside the camp.
The Man Who Fell to Earth has a very graphic sex scene in which the two shoot blanks at each other from a revolver during intercourse.
Otto; or, Up With Dead People, which is a gay zombie film with what appears to be unsimulated sex scenes. Particularly near the end when there is a (fake) zombie orgy.
Hostage (1993). Sam Neil plays a British intelligence officer — in one scene he stabs a female guerrilla. As she gasps when the knife goes in, there's an instant flashback to him having sex with a woman earlier.
Yukio Mishima's Patriotismis this trope, being the exquisitely filmed story of a young army officer and his wife who have sex and then kill themselves.
Lenina Huxley: "John Spartan, there is, of course, a well-known and documented connection between sex and violence. Not so much a causal effect as a general state of neurological arousal. And after having observed your behavior this evening and my resultant condition, um, I was wondering if you'd like to have sex?"
Even funnier when we discover that Huxley and Spartan have two completely different understandings of the word "sex."
Played up in the movie A Clockwork Orange, where the violence and rape is played out among images of nudity. You know the bit in the book where Alex beats the woman to death? He uses a plaster penis as the weapon in the movie.
For the most part, the violence in Munich is presented very bluntly and not at all artistically. There is, however, a sex scene juxtaposed with scenes of violence.
In Seed of Chucky, Chucky and Tiffany bring the spark back into their love life when they decapitate a prop guy with a piece of wire.
Sucker Punch is entirely about violence (the fantasy action sequences) as a metaphor for sex (working in the brothel), and sex (Babydoll about to be deflowered in the brothel) as a metaphor for violence (Babydoll about to be lobotomized in the asylum).
In Wild Things, about halfway through Suzie and Kelly have a physical fight in which Kelly almost drowns Suzie. It ends with them making out in the pool.
American Me: Santana's first time with a women after he's released from prison is intercut with a brutal gang rape perpetrated on his orders against a rival mafioso's son in prison.
In the Hyperion Cantos Kassad and Moneta slaughter a group of soldiers while the readers are treated to a description of just how much they're both turned one. Then they have sex on top of the bodies. In fact their entire relationship is like this.
Your body is so beautiful. I am going to run my hands over your smooth pale skin, softly, so softly, so you shiver at my every touch. Your body will be mine and I will hurt it, beautifully, you will feel every caress of pain. I will hurt you and hurt you, and when you think there is no pain left I will hurt you again. I will take you far away, to pain you could never dream of. And then you will bleed for me, a trickle, a torrent, a stream, until the last drop of your life falls to the floor and I can taste it. And I will, finally, feel whole and fulfilled, through you[...]
This lovely little paragraph is coming, basically, from a thirteen-year-old girl, and is apparently directed at the Doctor, who's a thousand-year-old Chaste Hero who looks like a handsome forty-year-old man. And his companion, who has no intention whatsoever of ever either hurting him or boinking him, is being made to say it. Basically, it's just gross.
Vampires in Dora Wilk Series live this trope, coming from one to another in blink of an (human) eye.
In the Outlander series, the Depraved Bisexual Captain John Randall is very much into this. He's shown to be incapable of getting hard unless he's beating or torturing the person he's raping.
The darkfey court in Wicked Lovely. Particular mention goes to how Niall's rape/torture was laregly treated as 'entertainment' by all except Irial (and Niall himself) and the whole 'shadow girl' thing. Melissa Marr has described it as both 'the court of temptation' and 'a place of cruelty'. Leslie describes Irial, their former king, as "Every horrible thing she shouldn't miss, every nightmare she shouldn't crave." Yeah, they're made of this trope.
In the Parrish Plessis series, the Eskaalim parasites feed on both sex and violence. Parrish, in an attempt to prevent her Eskaalim from driving her Ax-Crazy, learns to substitute sex when it tries to drive her to violence. This ends up backfiring, as the Eskaalim gets fed either way; her efforts merely end up teaching it that she is less averse to sex than to violence, allowing it to get better at manipulating her.
In IT Patrick suffocates his baby brother and is described as being turned on while doing it.
In the short story "The Screwfly Solution" by James Tiptree, aliens exploit the connection between sexual arousal and violence. A chemical agent is spread over the earth that causes men to become insanely, homicidally violent when aroused. It doesn't end well.
Spooks season seven: Lucas North has a brutal fight with a guy in a Moscow bar, which ends with him drowning the guy in the sink. During this fight, shots of a pole dancer upstairs appear frequently).
Supernatural: Most female demons, especially Ruby, Meg, and Dental Hygienist!Lilith, love macking on the boys while smacking them around.
The final filmed episode of Firefly has the crew transporting the supposedly dead body of one of Zoe and Mal's former squad mate. Jayne and Book end up talking about how everyone on the ship seems to act differently around the body, with Jayne admitting that seeing/being near a dead body makes him need to do something, work out, kill someone, get some tail (although he is quick to point out it's not because death makes him randy). And Book telling him it's a completely natural feeling, that the reminder of mortality, simply makes him want to experience life while he can. And then there's River, who straddles the coffin and rubs herself against it.
Michael: "Violence may be foreplay for you, Fi. Not for me."
Elliot Spencer's fight with Mikel Dayan in "The Two Live Crew Job" episode ends with them kissing.
In a different episode, Eliot begins to pound on the team's mortal enemy Sterling in a bar. What does Parker do? Stands there with a smile on her face. It was intended to be Parker enjoying watching Sterling get his comeuppance, but the Beth Riesgraf's smile was a little too gleeful (she's almost licking her chops.)
The first episode of Caprica contrasted scenes of a couple having sex to a violent mafia assassination.
The death of Marian in the second season finale of Robin Hood was described by the writers as "the consummation of Guy and Marian". The scene in question has her running up to him, declaring her love for another man, and then getting impaled in the lower abdomen. Guy draws her toward him, she throws her head back, and then slides down his body as a fountain in the background spurts water from his direction toward her.
True Blood: In "It Hurts Me Too" after Bill pins Lorena against a wall and tells her that he'll never love her, she kisses him. He does not react well to this, first going for her throat with his fangs, then responding to her urging him to make love to her by doing so extremely violently to the point that he leaves several cuts on her chest and twists her head around 180 degrees. Lorena loves every second of it, and dreamily says "Oh William, I so love you."
The first episode of Spartacus: Gods Of The Arena features a montage cutting back and forth between Gannicus having sex with two women and the other gladiators outside sparring. Then later in the same episode, Gaia and Lucretia's drug-fueled girl-on-girl action is intercut with Batiatus receiving a No-Holds-Barred Beatdown from a rival.
King Henry had six beautiful wives as portrayed on The Tudors, but it was Anne Bolyn and Katherine Howard who were portrayed as the most sexualised, with plenty of nude and sex scenes. These are the two wives who are eventually beheaded. In fact, Katherine Howard goes so far as to practice putting her head on the block in the nude. Perfectly demonstrated: here. Catherine did that in real life too - the practicing part, although presumably she was clothed.
Which perfectly leads to Star Trek: Deep Space Nine and Worf finally only understanding that Jadzia's been coming onto him for an entire episode after challenging him to a bat'leth fight. (The two then end up one of the series' official couples.)
A Bit of Fry and Laurie has a section where the pair apologise to the audience because Moral Guardians have banned them from performing a sketch involving sex and violence. Apparently it involved Stephen beating Hugh with a cricket bat very sexily, and ended with them going to bed together... violently.
A fourth season episode of Bones opens with the gang watching Booth playing hockey and beating the crap out of some guys on the ice (he's the team's enforcer). Cam says she likes it... a little too much. Then she has a Did I Say That Out Loud moment.
River Song's sexuality is based around this. She literally uses sex as a weapon, once murdering the Doctor by kissing him with poison lipstick.
For a more benign example, Sexy in "The Doctor's Wife" enjoys biting people because "it's like kissing, only there's a winner!"
The Chaos God Slaanesh in Warhammer and Warhammer 40,000 is the personification of this trope. Pain and pleasure, love and hate, beauty and suffering, all in one easy mindfucking package. It's followers are Sense Freaks and Too Kinky to Torture to the utter screaming extreme, considering any experience, win or lose, to be one to savour, regardless if said experience is, say, evisceration with a chain-axe or immolation with futuristic napalm. It's all good.
To the extent that their codex bears the phrase "Pray they don't take you alive".
That's actually from the Dark Eldar codex. Not that they don't fit this trope pretty well, altough they're more of Combat Sadomasochists.
Slaanesh's opposite is Khorne, the Blood God, who is a War God to the extreme.
All over the World of Darkness games, especially Werewolf and Vampire, and especially in the art direction.
The musical Les Misérables illustrates this trope beautifully with the song "Red and Black". It connects Enjolras' hopes for revolution with Marius' love of Cosette.
Sweeney Todd: The Demon Barber of Fleet Street, so much that it could easy be referred to as "Interplay Of Sex And Violence: The Musical". This was especially drawn on in the 2012 production with Michael Ball and Imelda Staunton; as she opens the trunk to discover Pirelli's body, Mrs Lovett emits a series of increasingly... ahem... ''titillated'' groans.
The Beatles: The song "Happiness Is A Warm Gun" on The White Album has Lennon singing about holding a gun in a tongue-in-cheek erotic manner: "When I feel my finger on your trigger/I feel nobody can do me no harm".
Some early Visual Kei works were this, and it spun off into the entireVisual Kei subgenre of Eroguro Kei, featuring bands such as Dir En Grey and The Gazette, In fact, to some Moral Guardians with no knowledge of the variance within Visual Kei, or to others who see the most popular and well-known bands as representing the entire scene, Visual Kei is Eroguro Kei - which poses problems for artists who prefer lighter and more positive themes such as the Lolita Kei and Oshare Kei subgenres in trying to find/appeal to audiences (because the sort of fans looking for Eroguro generally do not like them, and if Moral Guardians have been outraged by something an Eroguro band has done, the backlash is likely to hit the cleaner, softer bands just as hard)
Heather Heather We belong together Like sex and violence Like death and silence
In JayZ's "Meet The Parents" he describes Mike and Isis:
Hangin out the window when she first seen him fight She was so turned on that she had to shower twice
One of Noh's endings in the first Samurai Warriors games begins with her apparently trying to murder Oda Nobunaga... then, while still straddling him, she throws the knife away and gives him a passionate kiss instead. *fans self*
Her storyline in the third Xtreme Legends version takes this to another level. She seems to be split between a twin desire to either kill or schtupp him.
Alma's relationship with Becket shows definite signs of this in Project Origin, as all of their encounters involve at least one trying to kill the other at the same time.
Leona in The King of Fighters' Orochi Saga seems to enjoy herself quite a bit while beating the tar out of her opponent while in Blood Riot mode - including a Skyward Scream which many players pointed out didn't sound...quite like a scream of rage.
In KOF XIII, Shen Woo shamelessly admits that he's into this when he fights either Mature or Vice.
This is one interpretation of the effect of Brongaa's blood on Gulcasa and Emilia in Blaze Union; when Emilia goes insane in the B route, quite a bit of Accidental Innuendo and Orgasmic Combat ensues; after having to kill a soldier with Genocide or die himself, Gulcasa's state has been compared both to a drug high and immediately post-orgasmic afterglow, and he is shown as unable to think straight and describes the sensation as feverish and pleasurable. This is played as rather disturbing with Emilia in particular, as she's eleven years old.
Basically the point of the first Metal Gear Solid which mixes violence with sexual imagery about as much as it can while remaining relatively subtle, although it mostly eases off after that, when Snake gains control of his squicky fetishes. Comes back in full force in Metal Gear Solid 4, though, perhaps to underline his sexual frustration.
Then there's the fight between Vamp and Raiden in the fourth game which has some extremely, though somewhat disturbing homoerotic imagery: the grappling, the almost rutting-like motion when Raiden stabs himself to nail Vamp — and don't forget the white blood and the crotch-knife licking.
Togainu no Chi: One of the endings has Keisuke ripping out Akira's guts while proclaiming that he loves Akira. He's also sporting a look that seems similar to an orgasm.
Takeru kissing Akira during their fight and the two Punishers' Bad End, especially the one involving Gunji, where he slashes and rapes Akira as he bleed to death.
Fate/stay night. Gilgamesh and Saber. Well, from Gilgamesh's POV. Saber just wants to kill the bastard.
Tsukihime. The scene where Shiki first sees Arcueid in the street and stalks her home. The ambiguity of what he's stalking her home to do is stretched as far as possible before he finally kills her. There's also a few scenes that follow a serial killer and note he apparently gets off sexually whenever he claims a new victim.
Gunnerkrigg Court: It's strongly implied that there's "something going on" between Eglamore and Jones. So when they have a practice spar, Jones' partial disrobing is rather suggestive, and one onlooker describes the match as such:
Andrew Smith: What's going on? Parley: Elgamore and Jones are having a quickie! Andrew Smith: Ah. Clever.
Broken Saints plays with this a lot. Best example: the fight scene in Mars' strip club, mostly due to Mars' compensating for something with his conspicuously long handgun. Also, Word of God states the line "When the urge comes to you again... think of me" is supposed to refer to both violent urges and sexual urges, due to their all-too-connected nature in context.
Homestuck has a little bit of this with trolls: Trolls have four different kinds of romance: platonic love, platonic hate, sexual love, and sexual hate. While it isn't stated outright, one could pretty easy that the sexual hate in particular could lead to a great deal of this. There's even a case of Slap-Slap-Kiss at one point.
K'seliss from Goblins has stated that in lizardman culture, fighting, eating and mating are considered different forms of the same thing. In one scene he expresses disgust over fighting a swarm of metal monsters because they're inedible and fighting them would be a sexual perversion, and he also considers eating the fingers and limbs of potential mating partners to be an acceptable display of affection.
Yahtzee lampshades this during one review, stating "And here comes Titties! [Violence's] lovely wife and business-partner."
The show American Dad! has alot of this in the episode "For Whom The Sleigh Bell Tolls", but in the name of comedy. For example comparing sticking a magazine into a gun with the act of penetrating a woman.
Apparently Stan and Francine occasionally pull guns on each other and it always ends with "nobody got shot" sex.
Cheryl Tunt in Archer who is turned on by physical and emotional violence.
In Celtic Mythology, the Morrigan is goddess of both fertility and war. Sex and death, right there, what more do you want?
Astarte of Phoenician, Syrian, Canaanite and later Egyptian mythology was also a goddess of fertility and war, parallel to Ishtar.
She may (or may not) also be Anat (though she might also be her sister, at least according to Egyptians) who is an ancient Semitic goddess, for whom it is said that calling her violent "is like calling a tsunami wet". She is a goddess with dominion over love, sex, war, battle, fertility, maternity and death - to the point it is said she killed death for crossing her. Despite that, she's said to be a benevolent goddess, if an easily enraged one.
Classical Mythology had intercourse of sex and violence, what with the god of war Ares always running off and having affairs with the goddess of love Aphrodite.
Eros, the God of Love, was this trope. Ancient Greek soldiers would pray to him before going into battle; sex and violence were understood to be two sides of the same coin.
Aphrodite actually once was this, before the Greeks got uncomfortable with the idea. How much was she this trope? She was associated with Astarte and Anat. This explains her relationship with Ares very well...
Inanna/Ishtar: Sumerian/Babylonian Goddess of love, fertility, and war.