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Why Do Guys Get Sleepy After Sex?

~ AUGUST 2022 ~

It’s a question that’s been keeping (some of us) up at night: why do guys get sleepy after sex?

Many men barely leave time for the bed sheets to settle before they make a beeline for the land of nod, but is there any scientific reason why one gender might be more predisposed to a post-sex snooze?

Well, there is, as it happens. Science journalist and author Melinda Wenner Moyer of Scienceline (a project of New York University’s Science, Health and Environmental Reporting Program) takes a look at the possible factors that could play a part in this phenomenon; from context to timing to biochemistry.

For many women, the correlation between sex and snoring is one of those annoying facts of life: no matter when passionate encounters occur, men always seem to fall asleep immediately afterwards. Dave Zinczenko, the author of “Men, Love and Sex: The Complete User Guide For Women,” explained the phenomenon to Huffington Post writer Arianna Huffington this way: “Men go to sleep because women don’t turn into a pizza.”

I doubt I am ever going to become a pizza, and I’ll never have the foresight to order one beforehand. So in lieu of a cure, a better explanation will have to do. … Although women sometimes feel sleepy after sex, the phenomenon does seem more pronounced in men. What is it, then, that spirals them into the land of nod?

A version of this article originally appeared here on

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