In most fiction you encounter tropes involving sexuality. You run into occasions such as Everyone Is Gay, No Bisexuals, Everyone Is Bi, Anything That Moves, or even Extreme Omnisexual. You hear Silly Love Songs about Intercourse with You, and see Love Dodecahedrons, Kiss Kiss Slapping, Slap Slap Kissing, and oodles of Shipping.
What you don't seem to see are many characters who are of an age or situation to get sexually attracted - but aren't. You don't see many characters who aren't particularly interested in having sex or involving themselves in a relationship with anyone.
It is difficult to showcase a lack of something, so it is understandable that this orientation is often ignored, especially in works with No Hugging, No Kissing. However, this also leads to the common assumption that everyone is interested in sex, which can lead to awkward feelings for the asexual audience when sex is shown to be something everyone does and wants. This can also be a problem for the asexual character, both in-universe and out as fans and fellow characters alike will often dismiss their sexual orientation as a side-effect of depression, mental sickness, abuse or immaturity and not stop until they've succeeded in getting them to bed someoneso they can live a "normal" life at last.
It should be noted that asexuals are not incapable of sex or falling in love. Asexuality is often the lack of sexual attraction rather than sex drive or emotional attraction. As such, asexuals who are more indifferent to sex rather than actively averse to it may be quite capable of sex and masturbation (though this is not usually directed at any object of desire) if they need to. Asexuals in romantic relationships with sexual individuals, for example, may have no problem having intercourse with their partners for the sake of said relationship even if the act itself may not have the same significance or appeal as it would to sexual individuals. Unlike the aforementioned fully sexual individuals, asexuals do not actively desire said sexual actions and will not miss said acts at all if denied to them.
It should also be noted that, simply because a person is asexual, it doesn't mean they don't enjoy a good hug, and some may even like kissing. It changes from person to person as it does in everything else to the point where some have decided to call themselves demisexual. Normally lumped in with asexuals, but they can be sexually attracted to certain people once they've emotionally bonded with them. Some asexuals are "aromantic", too — not only are they uninterested in sex, but also in romance. Human sexuality being ridiculously complicated, there are a few people who are aromantic but not asexual, and some are sexually attracted to certain genders but romantically oriented towards certain others, in any which configuration.
Not to be confused with lacking sexual organs, being genderless or the biological term asexuality, which describes an organism that reproduces by itself without meiosis, ploidy reduction, or fertilization. See Truly Single Parent for characters who reproduce asexually.
The direct opposite of Extreme Omnisexual and frequently a victim of the belief that Good People Have Good Sex and Sex Equals Love. See also Celibate Hero and Chaste Hero. A possible cause of Married to the Job.
Likewise, some characters may only seem asexual; it could be that they're just too afraid of sex to actually seek it out.
Note: Only include someone if they are explicitly asexual, not assumed to be due to lack of shown attention. Also remember that whilst they overlap frequently, asexuality and having No Social Skills are not the same thing. No Fanon, please. As Truth in Television as this is, No Real Life Examples, Please!.
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Anime & Manga
Surprisingly for a popular mainstream shonen protagonist, Luffy from One Piece is asexual. The mangaka has gone on record as saying that he only takes part in the standard ecchi gags when Usopp's there to be a perverted influence and doesn't if his friends aren't around. Similarly to Sheldon, Oda explained it to the younger fans by saying that Luffy is only attracted to adventure (and possibly food). It's also worth keeping in mind that Eiichiro Oda has explicitly stated that there will be absolutely no romance in One Piece because "boys aren't interested in romance" so it's not surprising that Luffy takes no interest in girls.
Both Sasaki Miyasuzu (self-identified!) and Yuki Nagato from Haruhi Suzumiya.
Sawada from Tekkonkinkreet states his lack of interest in women, and has commented "I'm frigid" and "never had an orgasm".
Ayuki from Kashimashi basically states that love is something she'd rather aesthetically appreciate from a distance. She's not interested in having relationships herself.
Lloyd Asplund, of Code Geass, resident Mad Scientist, proposes to Milly Ashford within moments of meeting her, but because he wants her family's Knightmare Frame designs. His assistant Cecile later explains that Lloyd doesn't even give a second thought to matters of the flesh.
Naozumi Sudo from Naru Taru is an Übermensch who explicitly states that human sexuality is of no concern to him.
Mitsuya from Migite ni Juu, Hidarite ni Ai specifically states that he is neither straight nor gay and has no response in sexual situations.
Count D from Pet Shop of Horrors is asexual in both the biological sense and the socio-psychological one. Due to being one of the last surviving members of a highly advanced race of supernatural beings that reproduce asexually to give rise to offspring that are identical to them in every way, D has no physical need for sex. Being quite attractive, he is pursued by both womenandmen (some of whom make their intentions glaringly obvious); but he treats all of them with indifference and sometimes outright cruelty, should they become too forceful for his liking.
Ennis from Baccano starts as a straight example, being an Artificial Human. It takes her fifty years of Innocent Cohabitation with Firo to reciprocate his feelings, and as of 2002 (read - seventy-two years) they apparently still haven't had sex (although it's also because they suffer from a severe case of Twice Shy).
Anri Sonohara of Durarara is a somewhat twisted example. She herself suggests she's merely incapable of discerning her own feelings towards others, and a very strong point is made that she's the way she is due to psychological trauma and subsequent dissociation. Later she appears to actually be developing romantic feelings towards Mikado. Complicating matters somewhat is the fact that should she grow capable of love, she will become vulnerable to possession by Saika.
Max from Sam & Max: Freelance Police openly states that he doesn't like girls. He doesn't seem to show any interest in guys either. At one point he even said that he views a sex drive as nothing more than a nuisance distracting him from his most favorite of things... violence. In one of the video games, a time traveling incident ends up reversing this and turning him into a Casanova Wannabe, but he's soon back to normal.
In issue #4 of Johnny the Homicidal Maniac, Johnny may as well have jumped out of the asexual closet. He implies there are multiple reasons that he avoids sexual intimacy altogether after being accused of rape, one of them being "See, I don't want to touch anything. I don't want to feel anyone because I don't care about anyone like that, and to touch it is disgusting for all of its emptiness".
Rorschach of Watchmen is asexual, or at minimum repulsed by normal sexuality due to his traumatic childhood.
In Naruto Veangance Revelaitons, Sasuke is portrayed as asexual. While this would not normally stand out given how he appears to be close to this status in canon (one of the few things about his character the fic gets right), the author, who is of the belief that teenagers should have sex as early and often as possible, makes a special point of using him to bash asexual people.
Dave in Brainbent. It wasn't caused by his unfortunately sexualised upbringing (his brother had sex where Dave could and did walk in on him and left heaps of sex toys around the place) but it probably isn't helping the issues which were caused by it.
Hivefled: Eridan is repulsed-asexual and so terrified of having a cull-worthy abnormality that he slept with anyone who looked at him and convinced himself that the disgust and stress he felt was normal. Then told a rape victim so.
In Perfume, the Villain Protagonist is obsessed with the scents of nubile virgins, though he has no sexual interest in them, or anyone else. He hires a prostitute solely for the purpose of an experiment to capture her scent.
The Dutch drama Love Life (also known as Stricken) has a serial womanizer named Stijn as its lead. Stijn narrates the film, and when introducing his best friend, Frank, notes that Frank's libido is exactly the opposite to his: "He's not interested in fucking. It exists."
Brian Lackey of Mysterious Skin. He shows no interest in sex or romance, and seems repulsed when a female character abruptly tries to kiss, touch and undress him. Another character describes his "vibe" as "kinda weirdly asexual." His memories of the childhood sexual abuse responsible for this are strongly repressed until the end of the movie, as he believes he was abducted by aliens and not sexually abused.
Many copycats, "derived works" and even official adaptations, however, try to make this aspect of his personality questionable in order to appeal to a wider audience and introduce more drama into the equation.
In most of the derived works, Irene Adler becomes Holmes' love interest. In the original story, however, this was never so. While it's true he was interested in her, it was purely because she was one of the very few people to ever outsmart him. It was more fascination with her than care of any kind.
In the original story also, Holmes and Adler only ever meet once, and only very briefly. He hardly ever mentions her again in any other story either, except in passing as someone who beat him (he mentions that some men have beaten him too; she stood out not because he was especially attracted to or impressed by her, but because it was the Victorian era and women were thought to be not terribly bright.) He is fascinated by her, but not really any more than any other clever or unusual person he meets.
Sir Perceval, the heroine of Elizabeth Bear's Dust, is canonically asexual (although the word she uses is "celibate"). Perceval also uses "asexed", when explaining to Rian why she's not interested in her.
In Sheridan Hay's The Secret of Lost Things, the character Oscar is stated to have no romantic or sexual interest in anyone of any gender — unfortunately for the heroine, who's in love with him.
Tarma, one of the two female main characters in the Vows and Honor series by Mercedes Lackey, is magically bound to her goddess, and one of the consequences of this bond is that she feels no sexual desire whatsoever. (Her goddess is very into the whole Celibate Hero thing.) Though only of those sworn as warriors, due to her multiple aspects. Tarma also mentions to her partner that it should in no way stop HER from having many children, so to replenish her destroyed clan. Also notable in that, unlike most Swordsworn, Tarma allowed herself to become asexual in large part to deal with the trauma of having been raped by her clan's murderers. Later in life, she's simply become used to it.
Rachael Ghorbani, from John Ringo's Council Wars series likens her own asexuality to being color-blind or tone-deaf. She simply doesn't understand the attraction of sex and finds the physical implications revolting.
Played with in Bruce Sterling's Schismatrix, a Science Fiction novel - a group of asteroid settlers are all rendered asexual via a sort of chemical castration; The Hero agrees to turn off his sexuality in exchange for the settlers' diplomat amping hers up with drugs. This leads to an extremelysquicky sex scene. It also featured a brilliant explanation of sex as seen from the colonists' viewpoint: She asks him to put his finger in her mouth and asks, "How does that feel?", to which The Hero responds something in line of "Moist and uncomfortably intimate" - which is exactly how she would feel about sex.
Adele Mundy, from David Drake's RCN series, has "never been interested in mating rituals in either the abstract or the particular," and views the sexual obsession of most of the human race with bemused detachment.
Kevin, from the book "Guardian of the Dead" by Karen Healey, is an asexual.
Robert Merle's novel Death Is My Trade, based on the autobiography of Rudolf Höss, the commander of the Auschwitz concentration camp, portrays the protagonist (called Rudolf Lang in the book) this way. He gains more pleasure from polishing his boots than sex. He gets married and has children, but only because he feels that it's his duty towards his country.
Rudy Waltz in Deadeye Dick by Kurt Vonnegut fantasizes about organizing a pride march for asexuals like himself.
Most (but not all) of the characters in Greg Egan's Diaspora are neuter by choice. (In his Oceanic and Schilds Ladder, everyone is hermaphroditic – in two different ways.)
Played for laughs in The Alphabet Of Manliness, where Asexuality is judged as popping a boner while doing your math homework.
In The Culture novels, you have every variation of sexuality possible, including asexuality, present in the Culture citizens.
The "glorifieds" of the Left Behind series are that way due to the nature of their new bodies and minds.
The Halo books have the Spartans. One of the physical enhancements that the Spartans undergo at the age of fourteen suppresses their sex drive, and either the books don't really touch on it, or it's not important to Master Chief and his brothers and sisters. There is one Spartan named Maria who retired from the unit to raise a family, but still works as a beta tester for all their new equipment, so they probably aren't automatically aromantic.
Strictly speaking, the damping of their sex drives is a common side effect of the hormonal alterations that the Spartans are subjected to. While this represents a decrease in drive, it does not necessarily eliminate that drive entirely, nor does every individual Spartan react to the treatment exactly the same way. While asexual Spartans are the norm, exceptions can be expected.
Lily Briscoe from Virginia Wolfe's "To The Lighthouse" is described as asexual by Market Drabble in the introduction to the Oxford University Press edition.
Jenny Fields from John Irving's "The World According To Garp" is an asexual nurse who is repulsed by sex.
Robert Howard's puritanical swashbuckler Solomon Kane, expressly stated multiple times that he has neither the time nor the motivation to pursue or desire anything romantically or sexually. He needs only his trusty blade and wrongs to right!
Demons in The Bartimaeus Trilogy are asexual but certainly are aware that humans are not often asexual. They use this to their advantage as much as they possibly can, distracting or disturbing the magicians who summon them with various attractive forms that may or may not match the spirit's actual gender (insofar as they have one). Bartimaeus remarks at one point in The Ring of Solomon that his repertoire of forms is pretty well nothing but horrible monsters and pretty girls.
Clarissa Oakes, of the Aubrey Maturin series, was incredibly surprised when she heard sex was supposed to be pleasant. It made her not realize just how serious a thing being molested by her guardian was until much later. Even once she's married, she only has sex because her husband enjoys it, and is puzzled by the idea of being uncomfortable being undressed in front of anyone. She has some rather interesting discussions about this with Doctor Maturin, who has some...unconventional ideas about sexuality himself.
In Tales of Kolmar, Akhor wondered for most of his life if he was this, but conveniently he ended up having Single-Target Sexuality instead. The mage Vilkas, though, is flat-out uninterested in everyone, once thinking that he probably should sleep with his attractive best friend just to make her happy, but being relieved when she interprets his lack of reaction to being touched as rejection and pulls away.
In the short story "You Can't Be Too Careful" by Ruth Rendell, Della Galway is asexual - "no spark of sexual feeling had ever troubled her."
"Boss Tweed", the antagonist of The Opiuchi Hotline is asexual and believes that it gives him an advantage in the rough-and-tumble world of Lunar politics. Asexuality in John Varley's Eight World stories is complicated by something most authors don't consider: In a clothing-optional society with Easy Sex Change "none of the above" is always an option, so judging someone's orientation from their configuration is pretty much impossible. At least two characters assume asexuality when they meet people without apparent genitals but both turn out to be wrong.
Dexter Morgan from Dexter is uninterested in sex, but willing enough to keep his wife, Rita, convinced that he's a normal man.
In The World According to Garp the title character's mother is explicitly stated to not enjoy sex, only engaging in it once because she wanted a child.
According to "Tale of Ragnar's Sons" (13th century), viking warlord Ivar the Boneless "had no children, because of the way he was: with no lust or love".
Tori in R J Anderson's Quicksilver has a scene where she comes out as asexual.
Live Action TV
Spock in Star Trek: The Original Series seems to show a complete lack of interest in sexual or romantic relationships (Although this troper acknowledges asexuality does not necessarily mean being aromantic) unless he had been hit by spores or under some other external influence or under Pon Farr. He was almost a foil for Kirk in this way and showed a lack of response when people flirted with him or when Kirk talked about beautiful women. The reboot version of Spock seems to almost completely do away with the concept of Spock being asexual, instead inserting a fairly standard love story.
The Big Bang Theory: Sheldon, whose asexuality is made explicit within the series. In the season three finale Sheldon was set up by Raj and Howard by way of a dating site with a female version of himself. Sheldon seemed interested in her (granted, they only had one scene together), but she clearly stated that sex is not an option and Sheldon was quite happy with this.
Confirmed even further at the beginning of the fourth season... for both Sheldon and his date Amy. Upon Sheldon mentioning that he'd like to carry on his genes, they're asked about how exactly they'd do that. In vitro fertilization, of course... with Penny as a surrogate mother.
Amy seems to have warmed to the idea of intimacy over the series, bringing the idea of sex up with Sheldon (albeit when drunk) and having a certain amount of Les Yay with Penny. Sheldon, however, still has enough trouble with cuddling.
It's not made explicit whether Sheldon is truly asexual or simply represses any sexual feelings he might have. He confesses to Leonard that he's been fantasizing about Amy's dandruff and her pale, slightly hunched shoulders.
In Season 5, Penny asked Sheldon whether or not he would ever have sex with Amy and he said it was a possibility.
The Tick: While the cartoon series skirts the issue, the live action series from 2000-01 sharply juxtaposes the title character against the others as the only one completely free of sexual tension. The Tick's obliviousness to its presence in the people around him causes his sidekick, Arthur, at one point to deliver a tirade, and follow up his outburst with "No offense intended"; The Tick's response is "None comprehended". The actor, Patrick Warburton, who played The Tick, in an interview, said of his character "he doesn't seem to be sexually.... motivated".
However, according to the comic he has an ex-wife named Cloris.
Brass Eye: "Well, throughout tonight's program, we've had a naked asexual man up a stick, watching some pornography. Have you reached any conclusions?" *Asexual man shakes his head.* "Well, I hope that's been of some help."
Andy Hallett, the actor who played Lorne on Angel, was quoted as saying that while it was never officially established, the character was probably asexual.
Shortland Street, a New Zealand hospital drama with an entire arc devoted to Gerald becoming a self-identified asexual and how it affects his relationship with his girlfriend Morgan. The killer is when Gerald mercifully ends the relationship, and Morgan becomes enamored of anotherasexual man.
Patrick McGoohan deliberately invoked the trope for his characters in Danger Man and The Prisoner, feeling the sexual freewheeling of other media secret agents was sending a bad message.
Rose from "Series/The Golden Girls" never thought about sex before she was married and when her husband wanted to have sex for the first time she didn't really understand sexual desire.
The Professor from Gilligan's Island is uninterested in sex or romance, and more than once has been oblivious to the charms of the two attractive female fellow castaways. In one episode he admits to Ginger that he never had a romantic interest in anyone.
Poppy from the show Huge comes out as asexual to George.
Kevin in The Black Donnellys . He's the only brother who does not seem interested in sex of any kind, and a random old dude in the neighborhood, when seeing him with Jenny, gives odds that she's not his girlfriend because he's never seen "a more asexual kid in his life" than Kevin.
In Robin Hood, Sam Troughton once stated that he envisioned his character Much as being asexual, even though the writers gave him a couple of Love Interests.
In an episode of House, a female patient specifically describes herself and her husband as asexual. It turns out that neither is actually asexual; the husband has a tumor that gave him low libido and erectile dysfunction, and the wife lied in order to be with him.
The actor who plays the main character in Sherlock, Benedict Cumberbatch, has stated that his version of Holmes is asexual. However, show creator Steven Moffat said the exact opposite. He said that his version of Sherlock wasn't asexual, just celibate and dedicated like a monk, mostly since having Sherlock be asexual would kill any kind of romantic tension in the show (rendering Molly and, to a lesser extent, Irene completely unnecessary). He did have an intense connection to Irene Adler when she showed up, but it's not clear if it was sexual on his part or not.
Community - in "Regional Holiday Music", glee club captain Mister Radisson is insistent on the study group doing the Christmas pageant, but they're actively resisting - Jeff citing the guy's 'aggressive asexuality'.
Matt Smith of Doctor Who has stated that his incarnation of the Eleventh Doctor is asexual. This was somewhat confirmed by Steven Moffat as well, saying that all concept of sexual interaction is a completely alien concept to him (see the ending of "The Doctor's Wife," where the Doctor honestly cannot understand why newlyweds Amy and Rory wouldn't want to sleep in bunk beds.)
This song is all about asexual people... who don't want to touch butts.
Zonker in Doonesbury has consistently been portrayed as avoiding romantic or physical attachments to the opposite sex like the plague, partly from fear and partly out of his immaturity and naivete. He had one sustained platonic dating relationship with a woman who, in one strip, humorously demonstrated to Mike and J.J. how even her most blatant and obvious "come on" lines flew over Zonker's head and didn't even register. ("It's like dating an elf!")
Jesus' teachings in the Gospels about those resurrected will "neither marry nor be given in marriage, but will be like the angels in heaven", posible indicating that resurrected believers would not only not be able to reproduce, but will also not even have the desire for sexual intercourse.
Sometimes used by Bible students to argue the case that the "sons of God" in Genesis chapter 6 could not be angels, but rather be the children of Seth's lineage marrying those of Cain's lineage (the "daughters of men").
It could also be an reference to the idea that each and every angel was created as an unique act of creation by God. So likewise those who are worthy of resurrection will also each be an unique act of (re)creation by God. The arrangement of marriage was given to Adam and Eve and their descendants. These recreated humans are not really Adam's descendants in the biological sense as they where given life directly by God, not through Adam.
Space Marines in Warhammer 40000 (depending on what you treat as Canon) are this; most have no interest in such after the hypnosis, brainwashing, and indoctrination that leaves little desire but for glory and success. The roleplaying games Dark Heresy and Rogue Trader both include the Chem Geld trait (Deathwatch also has it, but there is no way for a Space Marine to actually acquire it during gameplay except as an Elite Advance), which renders your character this. Many psykers start the game with it as part of their background package.
The Computer of Paranoia ensures all Alpha Complex citizens are asexual through mandatory hormone suppressants (creating them via cloning instead). Occasionally individuals learn to counteract the drugs, or hide the fact they aren't taking them, or end up on an extended mission Outside of the complex, and Hilarity Ensues.
Psycho Mantis, who expresses a general disdain of sexuality. And, being a mind reader, is somewhat disgusted to find how often people think of it. Played with and Flanderized in The Last Days of Foxhound, where Mantis is not only disgusted by sexuality, but females as a whole (going so far as to vigorously scrub any area a woman touches with a special soap). He also calls certain women (like Sniper Wolf) "Slutbucket".
Though, specifically, it is the desire for procreation that disgusts him, not the desire for sex in and of itself, calling it (procreation) a "selfish and atavistic desire" that leads to war, and being horrified that nearly every living thing on the planet has been programmed by nature to want it, since from his point of view that means everything is a mindless drone. He might be speaking in broader terms as it being a symptom of a desire for immortality through ones works or children, since he thinks that he and Snake are Not So Different because they "have no past, no future. We live in the moment. Thats our only purpose.", and is somewhat relieved that Snake is unlike others in this regard.
Invoked with Meryl. When Snake is hitting on her, she claims that she's had psychological conditioning to suppress romantic feelings and sexuality. Either she was lying to get him to back off or they didn't do a very good job, considering she hooks up with him in the end, suggesting romantic feelings at least.
Ryu from Street Fighter. He is completely and 100% dedicated to fighting. This is something that Sakura simply doesn't ever get.
That depends on which incarnation/adaptation of Street Fighter we're talking about. Some have had him actively romantically involved with women, or at least showing signs of sexual/romantic attraction to them. Though in many cases it then trades asexuality for No Social Skills.
The 'Sakura doesn't get' assumes that Sakura has any interest. From (a relatively minimal look at) various items, her main interest is in fighting, too. And if her goal is to emulate Ryu ...
Agent 47 of the Hitman series of games is normally portrayed to be asexual, though there are some good reasons- number one, he is a clone engineered to be the perfect killer, and two- he has almost no social interactions with anyone at all except for Diana. Of note is a scene in the first game in which 47 rescues a Chinese prostitute from a brothel in Hong Kong. When thanking him, she kisses him goodbye- to which he actually recoils in disgust.
Interestingly, in the third game, which consists of 47's flashbacks of past missions, addled quite a bit with his own subconscious, his reaction to the prostitute's kiss is a pleased grin, which is the only time he is seen smiling. So perhaps he's not asexual, but simply too socially awkward to show his sexual side.
In the film, however, he is not so much grossed out by sex as he is simply disinterested. When the Hooker with a Heart of Gold tries making time with 47 at one point, he calmly sticks her in the neck with a sedative and quietly returns to his business.
The salarians in Mass Effect are an entire species of asexuals. They have no comprehension of romantic love, sexual attraction or even the biological impulses (ie: arousal). Sexuality is not hormone-based and is strictly for reproduction; they negotiate contracts around it and attaining a good contract is a high priority for males, but this is out of familial and social duty. However some occasionally find themselves strangely drawn to the Asari, one of them is profoundly affected by watching Thane Krios, and Mordin, who gets hit on constantly and assumes Shepard is doing the same, lets him / her down gently by saying that if he wanted to try human, he'd try Shepard. A very memorable overheard conversation between a salarian and his asari stepdaughter does show that they can form long-term deeper bonds, but asari reproduction doesn't need to involve sex.
Razah from the Guild Wars MMO could be considered asexual. He doesn't understand the complexities of human emotions like love and probably wouldn't be interested in relationships other than friendships. But since he was created out of the Mists, he doesn't have genitalia or a belly button, so his really being asexual could be debatable. Asexuals are usually people who have fully functioning genitalia but have no desire to use them with other people.
Somewhat suggested with Virginia in Magical Diary - she repeatedly insists she's not interested that way in anyone, male or female. Even if you manage to enter into a romantic relationship with her (which isn't easy), at the end it comes out that she'd really rather just cuddle.
Grey Is: Black is asexual, since childhood he's claimed to have no interest in girls. He does however intend to be a Dad, his plan is for White to marry a girl and give him the kids.
Ellipsis in the Web ComicSaturnalia is asexual, although she prefers calling herself a nonsexual. "I don't like using the word 'asexual'... It makes me sound like a sea-sponge or a lizard of some sort."
Grey from Inhuman is described by the author as asexual. It's probably something to do with the military conditioning.
Or maybe the paranoid schizophrenia? The author actually had to point out that Grey is clinically insane to keep fans from shipping him and Kyo.
Initially ambiguously implied and later confirmed of Erin in Girls with Slingshots; her romance with Jamie is stated to be more about cuddling than sex.
A later storyline returns to this topic when Jamie suffers from sexual frustration, putting strain on their relationship. This eventually gets resolved by their deciding to have a semi-open relationship, leading to a new wrinkle with Santa 2013.
The creator of The Dreamer has stated that Samuel Warren is asexual.
In the web-novel Fragile, Severin is asexual (although not aromantic, as the story is about him falling in love). We find out in its sequel, Perpetual Change, that it may be the result of being sexually abused by his sadistic aunt as a child. One of the other characters in the story, Helen, turns out to be asexual as well (and aromantic too, according to her).
The fact that sponges can reproduce by budding was actually mentioned in one episode, and Spongebob produced several "babies" on the spot. This was simply a throwaway joke, though.
The implication that he has a crush on Sandy can mean a number of things; he might be Camp Straight, heteroromantic asexual, demiromantic/demisexual... or it's just standard-issue Ship Tease.
Futurama had an episode in which the characters were turned into asexuals (both in biology and orientation).
Scooby Doo Mystery Incorporated: Word Of God states that Mayor Jones's love of treasure has turned him into this. Of course, we also see that despite his obsession with the treasure of Crystal Cove, he still had geniune feelings for his "adopted" son, Fred.