Still, the idea that straight men like it when two women make out (and more!) is so commonplace that it’s a cultural touchstone. They don’t even have to be real lesbians: “Those twins” are among the things a canonical Coors Light drinker loves. On Friends, Chandler and Joey give up their apartment—their apartment in Manhattan—for the chance to watch two of their straight female friends kiss for one minute.
So what is it about the sight of two women that, purportedly, sets male loins ablaze?
First of all, lesbian porn does not rank as highly among male sexual interests as do, “breasts, butts, MILFs, amateurs,” and even women with penises, according to the research of Ogi Ogas, a neuroscientist and co-author of A Billion Wicked Thoughts: What the World's Largest Experiment Reveals about Human Desire. For the book, he and co-author Sai Gaddam analyzed millions of searches, erotic stories, videos, personal ads and other data to find out exactly what makes humans tick down there.
But to the extent that lesbian erotica is popular, it can be explained by the fact that men are most aroused by visual cues that emphasize youth and downplay drama and emotional complexity. Lesbian porn, therefore, works for straight men by “doubling up” those visual stimuli, Ogas explained. The only thing better than one nubile, personality-free woman is two of them.
I pointed out to Ogas that this is a rather irrational desire: Lesbians are the only group of women who will categorically never be interested in a straight man. This is like someone named Steve entering a lottery called “Mega Millions for Anybody But Steve.” It’s not going to happen, Steve!
“It’s amusing that you offer up the fact that lesbians will never be interested in men as a possible reason why men should not be aroused by them,” he said. “Sexual fantasy obeys its own set of rules that have nothing to do with propriety, common sense, or even the physical laws of the universe. Women, for instance, are often aroused by billionaires and celebrities who are extremely unlikely to reciprocate the sentiment.”
(I maintain that Oscar Isaac is going to come around any day now.)
Ogas says that when it comes to fantasy, it gets even weirder than being into people who aren’t into you. “Many people nurse erotic fantasies of shrinking to the size of a mouse or being transformed into a furry bunny,” he said.
Interestingly, the reverse—loving gay male porn—is not quite true for women. At least, not in the same way. Unlike most men, Ogas says, most gay and straight women have an emotional, narrative component to their erotic fantasies. Straight women may have enjoyed Brokeback Mountain, but it was probably for the story.
Michael Bailey, a psychology professor at Northwestern University who has studied arousal, said when they’re asked by researchers, women say they don’t get turned on by sex scenes featuring two men. However, when researchers measure their levels of genital arousal, women seem to equally enjoy erotica featuring two women, two men, or a heterosexual couple.