Daniel Kruger and Susan Hughes, two researchers at the University of Michigan, argue that what happens after sex is just as important as the sex itself. In a study of 456 undergraduates, Kruger and Hughes determined that in couples, a woman is just as likely as a man to be the first to fall asleep. However, across the broad, regardless of gender, whoever was the partner who wasn't snoozing after orgasm felt really left out. The partner who fell asleep last after sex expressed a desire for greater bonding and communication from his or her partner. Whether that bonding comes in the form of spooning, watching a Netflix movie, or cracking inside jokes, one thing seems clear: Any behavior that doesn't involve snoozing after sex was considered best for solidifying a relationship with someone. Perhaps the ole bang-and-nap is better suited for casual sex, the researchers concluded.
The scientific belief is that men produce a lot of prolactin after an orgasm (post-sex, not post-masturbation), and it's that hormone that makes them super sleepy. The effort of sex often exhausts a dude and he needs to rest in order to sleep through that intense recovery period before he can have another orgasm, says science. While there may be some truth to that, whether or not we fall asleep probably also has to do with a lot of other factors: how tired we are, what time of day it is, and whether or not we feel the need to bond with a partner (especially if they're a new one) after boning.
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But, there's also something unspoken in these studies: Part of our post-sex behavior might relate to whether we want to do it again. Due to biology, women are more likely to be down for round two, but also, only a third of women experience orgasm regularly from sex alone. That instinct for spooning instead of snacking might be more alive in women not just because they have major feels, but because they would really like to have sex again soon, please and thank you.
As for the #aftersex selfie takers, I'm not really sure what that curious behavior says about the stage of your relationship, but it may indicate a high likelihood that you are under 18 and have an acute addition to Instagram.
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