I always wondered that. Why would a guy want to share a chick with like five other guys when it means he'll get less attention and he has to stand there and jack off while the other four dudes do their thing? Not to mention there's 10 eyes just staring at his naked body all weird-like; it seems like that would make any boner throw up its boner hands and give up its exciting boner career to become a lawyer like its boner parents always wanted.

I always wondered that. Why would a guy want to share a chick with like five other guys when it means he'll get less attention and he has to stand there and jack off while the other four dudes do their thing? Not to mention there's 10 eyes just staring at his naked body all weird-like; it seems like that would make any boner throw up its boner hands and give up its exciting boner career to become a lawyer like its boner parents always wanted.

But it doesn't seem to be that big of a detterent for men. It's well known that the biggest fans of gangbang and MMF porn are straight guys. Straight guys actually watch more MMF gangbang porn than they do porn that features one guy and many girls. Why, god, why?

It could be that humans evolved during the context of "sperm competition," a form of mating competition that occurs when females accept multiple mating partners over a relatively short period of time. The potential for overlap between the sperm of different males within the female has resulted in a diversity of behavioral adaptations and bizarre strategies for maximizing paternity. This, in part, describes why people get off on seeing other people have sex. 

Men have evolved adaptations to increase their chances of success in sperm competition. Some adaptations involve increasing sexual arousal. For example, when men estimate a greater likelihood that their romantic partner recently had sex with another man, they ejaculate more sperm the next time they have sex with her, as well as report greater interest in having sex with her.

To tie this all together, men’s preference for MMF porn is evidence of adaptations to sperm competition. Men who watch gangbangs are “witnessing” sperm competition unfold between the two men in that scene. And as sperm competition theory predicts, men have adaptations that cause them to become sexually aroused by the risk of sperm competition. Bam.

Sperm competition theory may help solve other puzzles about male sexuality. Notably, it may explain why men become jealous—yet simultaneously, sexually aroused—by the thought of their romantic partner having sex with another man. Gangbang porn can spark the same brain signal that jealousy does, and jealousy in turn activates arousal; it's your body's way of telling you that if you want to pass on your genes, you better get in there.

That's one theory. A related theory is looks at the differences in length of female and male arousal. Women have a delayed, sustained sexual response compared to men. But once they get aroused, they usually stay horny. And horniess bodes better for fertility.

Why would men have a quick, short sexual response, but women have longer ones if we evolved as couples? It doesn't make sense. It makes more sense that we would have evolved that way as a mechanism to allow women to have sex with multiple men over a brief period of time. Saucy.

A much more immediate reason why men love gangbangs it can be seen as degrading to women, and involves men asserting power and control, which can be hot as hell when it's consensual.

But men aren't the only ones who think "the more, the merrier" refers to dicks. Many women love gangbang stuff too, because the loss of control turns them on. Being ravaged, overpowered, and taken by pleasure (consensually) is something that a lot of women fantasize about. My guess is that it's for the same reasons mentioned above; the more men there are, the better chance of of pregnancy.

Fuck. If that doesn't suck the sex appeal out of gangbang porn like Whitney Houston sucking D for crack, then I don't know what will.