[flashback changes suddenly to Ned Flanders in a latex ski suit] Ned Flanders: Feels like I'm wearing nothin' at all! Nothin' at all! [close up of Ned's butt]Nothin' at all! Homer Simpson: [cringing] Gah, Stupid Sexy Flanders!
Several instances in Sailor Moon even after Haruka Tenoh is revealed to be a woman.
Haruka herself certainly doesn't mind the attention, even going so far as to playfully flirt with some of the Inner Senshi (particularly Usagi).
In the harem comedy Ai Kora, Handsome Lech protagonist Maeda is freaked out to learn that New Transfer Student Haiji Kikuno is a bisexual Love Freak who has the hots for him because of his "pure heart". Maeda is further freaked out when he learns Haiji has his ideal butt.
In Ranma One Half, most of Ranma's classmates find themselves attracted to his female form, even though they know that he's really a guy. The reason for this is most likely that he's susceptible to extreme Clothing Damage, especially in his female form, and that his curse actually gives him the real body of a girl.
To quote one chapter of the manga, "We don't care! She's still hot!" ... much to the disgust of the female classmates.
Also present in Urusei Yatsura, most notably with Ryuunosuke, who gets hit on from both ends... the girls, who know damn well she's a girl, love her because she cuts the figure of a bishonen man so well, and the guys love her... well... because they're horndogs, and know that she has an impressive-sized bust when her boobs aren't tied down.
Word Of God is that Tieria was originally going to be a woman, but something changed in the creative process.
Basically the entire premise of Maria†Holic, in which the lesbian protagonist transfers to a girl's school so she can be around a lot of pretty girls - and is very very annoyed when the prettiest girl turns out to be a cruel, rude, crossdressing boy... and she still gets nosebleeds when he flaunts his femininity
Girls Bravo: In season 2 episode 6,the main character Yukinari is forced to dress up as a girl, in order to host a gaming tournament. His disguise is so convincing that even the local pervert Fukuyama mistakes him for a pretty girl. This makes for one of the most humorous scenes in anime when Fukuyama finds out his true gender. Watch the moment of truth here.
No Bra is a delightful little manga about two male childhood friends who move away from each other and don't see one another again until they're all grown up... The protagonist stays largely the same as he was before, just taller, but his friend Yuki...◊
Naruto's Hatake Kakashi is widely suggested to be handsome underneath his mask. It's enough to make a ramen waitress, and her father, blush.
In episode 53 the normally straight Jiraiya tells Naruto after seeing him in just his boxers (japanese version) "You're quite sexy when you're naked." and (english version) "You know, you have quite a tight sexy little body."
Bleach Has quite a list of these characters. Ichigo, Byakuya and Ukitake just to name a few.
Kenichi: The Mightiest Disciple: Upon meeting Natsu Tanimoto, Kenichi spends as much time worrying that he'll steal Miu as he does just being utterly floored by his good looks.
Hideyoshi Kinoshita from Baka to Test to Shoukanjuu who looks like a girl, speaks like an old samurai and (tries to) act like a guy, all but insists he's male but has about as much success in convincing people as Bridget or Ranmaru. This leads to quite a few awkward moments, especially when he gets chosen to be the official "round girl" for the summoning war in episode two of the anime. One joke is that "Hideyoshi" has become its own gender designation within the story as both men and women object to him changing in the men's room, and Hideyoshi himself refuses to enter the women's room.
Konori Mii from A Certain Scientific Railgun provoked this from everyone in episode 13 while in her swimsuit, including Kongo Mitsuko's snake. No small feat, considering the other girls were already strutting some nice guns in their swimsuits, and let's not get into Kuroko's Barely-There Swimwear...
It may or may not make it an even stronger example since she was in love with Senjogahara herself.
In one episode of Natsume Yuujinchou, Natsume gets possessed by a female youkai who occasionally surfaced through his voice and mannerism. Kitamoto and Tanuma can't help but find the result uncomfortably attractive. There's also the time where, without any sort of supernatural aid, he managed to fluster a lesbian.
Hinoe:...Dammit, you look so much like Reiko! Why do you have to be a man!?
One Piece: Nami calls Kalifa a sexy secretary who she'd be "happy to have" as her own secretary before remembering she's not a Dirty Old Man. The yuri fandom rejoiced.
Then there's Ivankov. DEAR SWEET MOTHER OF GOD. See here◊. What's wrong with that, you may ask? Well, that's only Iva-sama when he's in a "feminine mood." When he's a guy, he's... well, the one in the middle. Note that he is wearing the same clothes◊.
And in the anime, when Ivankov arrives to Kamabakka Kingdom with her female appearance, Sanji immediately mistakes her for a woman and falls for her. Hilarity Ensues when Ivankov switches to her true form.
Happiness!: The entire male population of the school is conflicted between the knowledge that Jun is a guy, and the fact that he makes a very convincing girl.
Death Note: The live action movie gives us the Spaceland bus driver describing Light as "quite a good looking guy-not that I'm into guys..."
In Trigun, one of the Roderick Thieves, Nagi, gets a bit slap-happy when he sees one of the slaves they've just captured eyeing Legato for too long. The Vice-Chief is pretty sure he knows what about Legato is making Nagi so antsy.
Vice-Chief: I get it. He's almost horrifyingly handsome, but you're too cruel.
Otomen: Ooji Suzaku's sheer sex appeal makes even Kasuga flustered. His nickname is "Prince Pheromone."
The eponymous character from Kunisaki Izumo No Jijou looks so much like a girl that he tends to attract unwanted attention from men, much to his chagrin.
Played for laughs in Attack on Titan. Team Dad Reiner heavily hints that he's gay, but that doesn't stop him from occasionally expressing the desire to marry Christa whenever she's being particularly cute.
Takes a rather dark turn when Reiner is revealed to be the Armored Titan that busted the hole in Wall Maria five years ago and sent humanity retreating back.
Kiba in High School Dx D at one point gender bended himself temporarily and dressed as a nurse to take care of a sick Issei. Even though Issei knew he is a dude and his best friend in the club, he can't help but be attracted to him. Made worse by the fact that Kiba as a girl is Issei's type of woman.
Daken was this to Venom and Bullseye in Dark Avengers. Add to that the fact that Daken is Bi and also emits pheromones which can make him influence people of the opposite gender. Making his Stupid Sexy Flanders a superpower.
Deadpool, as it turns out, has a giant squealing fanboy crush on Thor.
Thor: You will be handed over to the authorities. Imprisonment shall be yours. The fate of a thief.
One issue of Spider-Man had the titular hero go headfirst through the windshield of a car where one male police officer is commenting about Spider-Man's form-fitting costume to his male partner. After a beat panel, the first officer points out Spider-Man's toned butt.
"That's what ragers are for! Your friends are sweet, and wild, and Willow has made me bi-curious but don't tell her that."
Nobody Dies has this occur in chapter 14 with Ritsuko having thoughts about Maya in a plugsuit. What makes it notable is that not only is a direct homage to the trope-naming scene, it helps her come to terms with her sexuality and paves the way for an eventual Relationship Upgrade with Maya. Also, no squick for Ritsuko.
Mentioned briefly in Princess; Julien is a female-to-male Transsexual, and can pass as male quite easily to anyone who doesn't know enough about lemurs to tell the difference. To other lemurs, however, it's a different matter, and surgery isn't really an option for him. Maurice mentions how awkward it is to work for a male-identified king who so strongly resembles an attractive female.
Raziel is very prone to giving Biff some of these in Lamb: The Gospel According To Biff, Christ's Childhood Pal. Sure, Biff hasn't been laid in about 2,000 years, but sometimes you have to wonder. There's even a scene Biff demands to see his angel-junk before the straight part of his brain realizes when he's doing and makes him stop. He insists it was purely curiosity. We completely believe him on this. Raziel is also literally stupid, and is described as being as dumb as a sack of hammers.
Terry Pratchett very explicitly lampshades the "man cross-dressing is beautiful" trope in Jingo before utterly and wonderfully subverting it. The man in question is Nobby Nobbs, who carries a card signed by the Patrician certifying that he is almost certainly human. Because it's often necessary.
He is extremely reluctant to change out of his female clothing, and afterwards Nobby is, for reasons never adequately explained (well, except for Rule of Funny), prone to volunteering to be used as the ostensibly female bait in any "sting" operation. Despite the fact that the beautiful and actually female (and hypercompetent, as she's also a werewolf) Angua is also in the Watch, and is frequently partnered with Nobby for these operations. Very few people actually have Stupid Sexy Flanders reactions to Nobby, despite his expectations.
Harry Potter: It's worth mentioning that Harry himself has a lot of Stupid Sexy Flanders moments when Bill Weasley is around, and when watching Tom Riddle in the Pensieve. And at least one moment with Cedric Diggory... and he pretty much can't refer to Sirius's teenage self without dropping the word "handsome."
From the fourth film, Parvati Patil seems to have one when Hermione walks down the stairs all dolled up for the Yule Ball. Her jaw drops and she exclaims "she looks beautiful".
Even Pansy Parkinson, Hermione's arch-nemesis, can't seem to stop gawking at her during the Yule Ball.
A guy briefly dates Christine. During that episode, all of the women who have even momentary contact with him take photos of him on their phones, which they trade and discuss whenever he's mentioned. In addition, he confuses the hell out of Matthew.
Probably the best example of this is Ace Rimmer from Red Dwarf "What a guy!"
Indeed, the ostensibly straight alternative universe Kryten went so far as to proposition Ace.
Early plans for Buffy the Vampire Slayer included having one of the Scoobies come out as gay (logically, either Willow (who eventually did) or Xander (who didn't)). The former's chances became markedly increased with occurrences of this trope after her Evil Doppelganger episode, in which Real Willow comments, "I'm so evil and skanky. And I think I'm kinda gay."
From the same verse: In one of the early episodes of Angel, this bit of dialogue occurs with Doyle, otherwise shown to be straight:
Doyle: Just look at him, going out to fight evil, his long coat swinging behind him in a mysterious and attractive manner... Cordelia: Do you need a moment? Doyle: I'm not saying I'm attracted, but... (Angel comes into the office, says some heroic-sounding stuff, and marches off with his coat swinging in slo-mo.) Doyle: Maybe I'm a little attracted.
In "Superstar", everyone in Jonathan's world is hot for Jonathan. Buffy, looking for clues, asks Giles if he has a Jonathan Swimsuit Calendar. He replies "No! ...yes. It was a gift!"
Xander has a few of these moments.
Xander: No one is judging you. It's understandable! Spike is strong and mysterious, and sort of compact, but well-muscled...
Buffy: I am not having sex with Spike! But I'm starting to think that you might be!
Merlin isn't blushing. The actor is blushing— and there's no telling what might have happened on set to make that happen.
There's also this gem about Arthur from "Sweet Dreams":
King Alined: Every woman in the land is attracted to this boy! I'm almost attracted to him myself.
Chandler's reaction to a photograph of Tag in an episode of Friends. "Wa-ha-how! Don't show this picture to Monica! And please don't tell her about the 'Wa-ha-how!'"
Also in Friends, once when they found out that Phoebe spoke French, Rachel said, "Oh! You're so sexy!"
In another episode, Phoebe was stunned upon seeing Monica in lingerie, saying that she had "the breasts of a Greek goddess."
There's also one episode where Denise Richards plays Ross's cousin, and all the guys (yes, even Ross) are turned on by her. Every time she shows up on screen, the intro of "I'm Gonna Love You Just A Little Bit More, Baby", song of the late Barry White, is playing on the backgroud, while her hair floats. The episode ends with her showing up at Phoebe's house, who opens the door, has the exact same reaction as the guys (same sexy music, etc), and having an inner monologue that ends with Go for it! She's not YOUR cousin!
In the episode where Brad Pitt plays Will, an old friend of Ross's, when Ross sees him and notices he's now fit he blurts out "Will! Hot stuff!" He then immediately questions himself for saying that first before anything else.
To be fair, this trope is oftentimes a staple part of Friends' humor.
One episode of Will and Grace has a woman causing this reaction in Camp Gay Jack. The woman was actually a transitioning transsexual who was "Karla from the waist up, and Karl from the waist down" until The Operation.
On The Colbert Report, one of Stephen Colbert's threat-down's was "threats to his heterosexuality" and number one on the list was "attractive men" such as Johnny Depp and Brad Pitt. As he puts it, "I'm not gay, but I'm human."
In one of the countless Keen Eddie bromance gags, Monty encourages Eddie to to yet again stand up their intimidating boss Superintendent Johnson, and says, "It kind of scares me, but I like it." He adds that it's what he's looking for in a relationship, and that he thinks he's attracted to Eddie. Later, during the confrontation in Johnson's office, Monty tries to make a quick exit before the shit hits the fan, and means to tell Eddie "I'll leave you" on his way out. But, it comes out, "I love you.".
Quantum Leap featured a variation: the first time Sam leaped into a woman, Al was quite disturbed to find himself attracted to his friend's new body. One possible explanation given was "latent homosexual tendencies," which he immediately dismissed. Oddly enough, it never happens again despite Sam leaping into a few other women over the course of the show.
Those later episodes also indicate that Al sees Sam as Sam, not the person he leapt into, while the opposite was true in the episode mentioned above. Fanon guesses that the "disturbing attraction" incident led the Project to fine-tune the connection between Al and Sam so it wouldn't happen again.
The episode "Believe in the Stars" has Tracy dressing up as a white woman to prove a point. When he runs into Frank and Toofer, he asks, "Do ya think I'm sexy?" in a high girly voice. Frank laughs, "C'mon Tracy, we know it's you," then swallows hard and says, "And yes."
When Liz guesses (wrongly) that Elisa's dark secret is that she is a man, Elisa retorts "Do you want to see me naked?" Liz's response? "Sort of." Of course, Elisa is played by Salma Hayek.
In another episode, Liz and Frank fall for the same delivery boy, leading Frank down a journey of self-discovery. And then there's this quote from the same episode.
Liz: No, that's not a thing, you can't be gay for just one person... unless you're a lady... and you meet Ellen.''
Hugh Laurie: You look absolutely great! If I was homosexual I'd want to buy you a drink, at the very least. Fascist: Thanks. If I was homosexual I'd have a pint of lager. (awkward pause) Hugh:As it is, I like birds. Fascist: Me too!
In "Tommy's Not Gay" of Titus, Titus has a moment in the neutral space where he talks about how everyone has had at least one moment where they are flipping through a Muscle Magazine "'cause you're a man" and upon seeing a well-toned man, he talks about his large biceps, ripped abs, and he briefly starts swaying his hips before he realized what he was doing. Throwing the magazine while screaming, he quickly did five push-ups and walked off, talking about going to a strip-club.
An episode of the American Breakfast Time had Suzanne Whang interview Talisa Soto when the Mortal Kombat film came out; when they sit down on the couch, Suzanne does a double-take, is momentarily rendered speechless and says "OH! I'm sorry, I was startled by how beautiful you are!"
In later seasons of That '70s Show, Fez obviously had a man-crush on Kelso. To the point that, in one episode, he saw an erotic dream about Kelso, too disturbing even for him (and for Kelso too, after he learns) . As Fez later mentions, his admiration of Kelso's looks is "purely aesthetic".
Cory in the House: Cory finds himself lusting after a pair of chiseled legs in a pair of Daisy Dukes, only to find, to his eternal Squick, that they belong to one Jason Stickler.
During Lita's run as a color commentator for WWE, she invoked this when Molly Holly (who was known for dressing conservatively) came out in a relatively low-cut top. Of course, Lita sounded wooden and completely uninterested - even more so than usual - which ruined the effect.
In the comedic Supernatural Season 5 episode "Changing Channels," the Trickster starts throwing Sam and Dean into different TV shows (and each is a thinly-veiled Affectionate Parody of an existing TV show and/or genre) in an attempt to get them to "play their roles" in the Apocalypse. He first tosses them into Dean's Guilty Pleasure show, Dr. Sexy, M. D., which is a nice Take That to Greys Anatomy. When Dean sees Dr. Sexy walking down the hallway, he immediately gets all flustered and embarrassed and looks at him in an admiring and slightly flirty way. It turns out to be the Trickster in disguise and Dean figures it out because "what makes Dr. Sexy sexy is that he wears cowboy boots, not tennis shoes!"
Michael Scott's epic mancrush on Ryan the Temp on the U.S. version of The Office. He gives Ryan the "Hottest Office Member" Dundie award, openly admits he'd sleep with Ryan (in "The Fire"), and calls Ryan "sweetcheeks" once in Season 3. And there are many more examples.
Seinfeld - George gets all anxious and upset after he gets a massage from a male therapist...when someone mentions Evander Holyfield and how he's a good-looking man, George gets worse...then more so seeing a poster of Holyfield.
On How I Met Your Mother Lily mentions that her friend Robin (who is a woman) is many things: "Friend, confidante, occasional guest star in some confusing dreams that remind me a woman's sexuality is a moving target."
Topanga: If it's any consolation, I think you can do a lot better than Jennifer Bassett.
Shawn: You think so?
Cory: Wait a minute, Topanga, have you looked at her?
Topanga: Okay, so she's pretty, she's tall, she drives a red new convertible, oh heck, I'd go out with her.
Glee: As of 3.02, Mike finds Kurt's sashaying super distracting. Also, in "Hold On To Sixteen" Santana, a lesbian, says that even she felt something stirring in her "lady loins" when she saw Sam do that "magic sex dance".
In Parks and Recreation, Leslie Knope has used the term "beautiful" to describe her best friend Anne on a fairly frequent basis.
On the August 14, 2012 episode of The Daily Show, Jon Stewart mentions that the day before he'd had "Robert"Pattinson" as a guest on the show, and stares off into space and says, "he was... handsome..."
"Community": In "The Politics of Human Sexuality", Troy says that he lost the basketball match with Abed because "[his] eyes are too gentle and mysterious".
Jimmy: Remember that other guy in it, Jude Law? Well, ever since I saw that movie...I think...I could be queer for him. And have never had a homosexual feeling ever in my life (that I ever acknowledged). I mean, he was beautiful, he was prettier than the girls in that movie! And it caught me surprise; I'm watching the movie and I find myself going, "I wonder what he's gonna wear in the next scene. I hope it's linen. Ooooh, it's a pancake hat on a scooter! FRICKIN' HOT, THIS GUY!"
This an a lot more of male insecurities are the central theme in ¿Quien Pidio Pollo?, a stand up comedy by the colombian actor Antonio Sanint.
This is apparently a problem for players of Metal Gear Solid, which carried over to Snake's appearance in Super Smash Bros. Brawl. The fact that his Final Smash does end up putting his ass in your face doesn't help (neither does the fact that the section about it on Nintendo's official site actually has a screenshot paused on that one moment). On the Brawl official site, there's one shot of him manhandling Ike in an ambiguous manner, one shot of him posing serenely while fondling the rocket launcher resting between his legs, and one shot of him kicking at the camera with what probably qualifies as 'upskirt'. Four of the other screenshots have his incredibly shapely buttocks right at the focal point of the picture, as well as his "Congratulations!" screen when you beat Classic mode, and his pose on the character scroll in the opening cinematic, and his pose whenever he loses a match. For a manly male character, he does a lot of cheesecake.
In an odd femme jealousy subversion of this, Serra from Fire Emblem: Blazing Sword starts trying to lay out terms of being around the camp to this beautiful blond girl who just joined their ranks. During the conversation Serra discovers this beautiful blond girl is a Monk named Lucius, and Lucius is quite certain he is in fact a monk, and male. However, given he looks like this◊ it's hard to blame her for her conclusion.
There are a lot of characters who face the viewer in their official art. They do not, however, follow Legault's◊ method of planting a smirk on his face and looking like he enjoys the attention. And posing rather seductively.
Link from The Legend of Zelda has caused this in a few straight male fans. The pantslessness of some incarnations of him only adds to it. Perhaps not coincidentally, he's a very popular target for Gender Bender art.
Beyond that, he was even voted by "Out" Magazine as the Hottest Video Game Character, complete with this quote: "When darkness enshrouds the land, Nintendo's sexy farm-boy-turned-wolf sets out to save the day in this upcoming game. His weapons: a sword, a bow, arrows and kick-ass grooming skills." Cue the insecure fanboy cries of "I'M LINK'S NOT GAY, DAMMIT!"
And on the girls' side we have Sheik. Many a fangirl were not happy to find that Princess Zelda Dropped A Bridget On Them. The infamous Gannon Banned website even has, "not accepting that Sheik is a most epic Reverse Trap," as one of their Gannon-Bannable offenses.
As explained in the comic, Ted is TOO girly for gay men(Well, Justin at least) to find attractive. Straight men, on the other hand...
It's hard to say if this version from El Goonish Shive is a subversion, inversion, reversion, or just plain weird. female!Elliot objects to his girlfriend ogling male!Susan, leading to the following exchange:
Sarah: I'm sorry, Elliot, but look at him!
female!Elliot: ...yeah, I guess he is hot.
female!Tedd: Um, dude...?
female!Elliot: What? I'm wearing a skirt, and I have boobs. I'm not going to start worrying about my manly image now.
Noah has been informed in the past that he has this ability:
Noah: I've been told I could make straight men see rainbows.
Aragorn: Your character is seriously hot. She's hawt with a capital "HAW". Legolas: My character is a man! Aragorn: Your character portrait says differently. ME-OW!
I'd argue he's just attracted to elves, full stop; sure, he didn't mistake Elrond or Celeborn for hot ladies, but he didn't pay attention in any of their scenes. He did pay attention to Haldir's arrival at Helm's Deep, and assumed him to be a sexy spy for Saruman, leading to the line:
Théoden: Aragorn, we are in no position to turn away friends, no matter how disturbingly attractive you find them!
In The Dragon Queen, caretaker and guardian Rodney finds himself attracted to his cross-dressing ward and immediately orders Bradley to never wear such clothing again in his presence. He gets called on it later and repents.
Dabbler from Grrl Power (see page picture, the Underboob on the right is hers) inspires this whenever she turns on the succubus charm to the max (she loathes having to lower it "below ten" in her own words) and straight women who see her in this appearance can be seen repeating "Not a lesbian!" in their mind over and over.
And men have to remind themselves that they're married, or that she's a subordinate.
Spoony wasn't worried about being gay, but a different sexual kink: He was just ranting against gamers who consider the underaged Rikku hot, when they slip in a pictue of a *ahem* well devloped cosplayer in a kinky Rikku costume, distracting Spoony for a moment before cursing the 'Stupid Sexy Cosplayers'.
Homestar Runner does an annual review/mocking of photos of fan-made HSR costumes. In the 2005 edition, Strong Bad was baffled by a hot woman dressed in a Homestar costume. ("Hot Homestar?! My brain is splitting in half!") He screams and runs away when the real Homestar walks in, offers him a back rub, and calls him "sweetie".
In the Oggy and the Cockroaches episode "Face Off", Joey see a picture of a live-action human. Wich he swaped Jack's photo of Oggy and has meaty doctor turns him into that picture. After the operation, Nurses swoon over the live-action human faced Oggy.
A Truth in Television. According to some studies hardly anyone is completely heterosexual or completely homosexual, and so it can happen that someone who mostly prefers people of the opposite sex can have sexual fantasies about people of the same sex, and vice versa.
Arthur C. Clarke said it best: "I think we're all polymorphously perverse to some degree."
Music producer Steve Binder expressed this regarding Elvis:
Steve: "I'm straight as an arrow and I got to tell you, you stop, whether you're male or female, to look at him. He was that good looking. And if you never knew he was a superstar, it wouldn't make any difference; if he'd walked in the room, you'd know somebody special was in your presence."