I don't mean it the way it sounds, but gosh, if I had been a superpowered mad god, escaped from hell, here to destroy the universe, I would have paused to chat up Vanity, too. I mean, she has that way about her, bright and fiery good looks that draw men like moths to candle flame. And she had undone the top three buttons of her blouse again.
In Xanth, a woman showing her panties causes any observing man to space out. This is an actual magical phenomenon in that world. Only partial nudity has this effect: nymphs, centaurs, and other human or demi-human creatures who routinely go naked do not cause this. Its mentioned in the books that this is, at least in part, because such creatures consider nudity to be "a part of nature", and no different from ordinary animals not wearing clothing. Humans, on the other hand, always try to cover themselves up, and that modesty is the reason for the magic.
Dave Barry explores this phenomenon in Dave Barry's Complete Guide to Guys. He refers to it as "Lust-Induced Brain Freeze," or LIBF for short.
Arthur C. Clarke's Rendezvous with Rama contains a passage detailing a space captain's frustration with the distractions of jiggle physics in zero-G, concluding that he's "quite sure that at least one serious space accident had been caused by acute crew distraction, after the transit of an unholstered lady officer through the control cabin." One woman, upon reading this, wrote that she agreed that such distractions would make male astronauts unable to do their jobs, and thus the space program, as a precaution, would have to exclude men.
Non-human variation in A Game of Thrones: Ser Loras Tyrell knowingly rides a mare in heat in the tourney, causing the stallion of his opponent, Ser Gregor Clegane, to be skittish and difficult to control. Also shown in the TV series.
A few books later, Edmure Tully is so distracted by the prospect of, uh, getting to know his new bride better that he completely fails to notice his family, friends, and king being massacred down the hall. Their first child was conceived that night.
This is the second time that sort of thing has happened to him. A book earlier, he completely missed the fact that his most important prisoner was escaping from his cell because he was too busy heading off to a brothel.
Any male in The Pale King who is in the vicinity of Meredith Rand, with the exception of Shane Drinion.
Margo Smith of Time Scout can cause minor traffic jams with her skirts. Malcolm Moore has a lot of trouble focusing around her. Well, focusing on anything but her.
Molly in pulls this off on purpose to get some information out of a young PI with integrity. It was a hot day. So she removed her bra and cooled her chest, taking over a beer bottle to talk to the guy. He never stood a chance.
Tera West does a naked dance in the rain to decoy the cops who are watching Harry's apartment.
A rare in-combat example takes place in Grave Peril, when Thomas sexes up a possessed woman to stop her from strangling Harry.
In A Desert Called Peace, the sight of Carrera's first wife, Linda, passing by causes a car accident and a man walking with his wife to accidentally walk into a lamp post.
After disguising herself as a woman who doesn't know "...how to spell FBI." in Blackout Agent Bronsky discovers she has this effect on men, causing a passerby to fall over someone else as she walks by him.
Older Than Feudalism: In The Ramayana, one aside during Rama's wedding procession describes how a man marching in the parade sees a girl in a chariot in danger of having a Wardrobe Malfunction. He's so distracted he ends up walking into the rear end of an elephant in front of him.
In The Titan's Curse, Percy meets Aphrodite and is reduced to speaking gibberish.
In The Demigod Diaries, Percy is supposed to come up with a clever plan. Instead, he starts thinking about how Annabeth looks...
The way her Camp Half-Blood beads rested against her throat - okay, sorry. Got a little distracted.
In the 87th Precinct novel Ten Plus One (about the race to find who's murdering people around the city with no apparent connection), the officers on duty have this reaction when one of the potential victims, a stunning blonde actress, arrives seeking protection. In case you're wondering, they catch the sniper before he can cross her off his list.