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Why Do Guys Get Sleepy After Sex activity?
This answer is provided by Melinda Wenner of Scienceline, a project of New York University's Science, Wellness and Environmental Reporting Programme.
For many women, the correlation between sex and snoring is one of those abrasive facts of life: no matter when passionate encounters occur, men always seem to fall asleep immediately afterward. Dave Zinczenko, the author of "Men, Love and Sexual practice: The Complete User Guide For Women," explained the phenomenon to Huffington Post writer Arianna Huffington this way: "Men get to slumber 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 society one beforehand. So in lieu of a cure, a improve explanation volition have to exercise. Although women sometimes feel sleepy later sexual practice, the phenomenon does seem more pronounced in men. What is it, then, that spirals them into the country of nod?
First, the obvious reasons for sexual activity'southward somnolent sway: the act ofttimes takes identify at night, in a bed, and is, afterward all, physically exhausting (frequently more than so for the man than the adult female, although this certainly varies). And so when sex is over, information technology's natural for a guy to experience sleepy.
Secondly, research using positron emission tomography (PET) scans has shown that in lodge for a person to reach orgasm, a primary requirement is to let go of "all fear and anxiety." Doing and then also tends to be relaxing and might explicate the tendency to snooze.
And so at that place is the biochemistry of the orgasm itself. Research shows that during ejaculation, men release a cocktail of brain chemicals, including norepinephrine, serotonin, oxytocin, vasopressin, nitric oxide (NO), and the hormone prolactin. The release of prolactin is linked to the feeling of sexual satisfaction, and it also mediates the "recovery time" that men are well aware of—the fourth dimension a guy must wait before "giving it some other go." Studies accept as well shown that men deficient in prolactin have faster recovery times.
Prolactin levels are naturally higher during sleep, and animals injected with the chemical go tired immediately. This suggests a stiff link between prolactin and slumber, so information technology's likely that the hormone's release during orgasm causes men to feel sleepy.
(Side note: prolactin also explains why men are sleepier later on intercourse than after masturbation. For unknown reasons, intercourse orgasms release four times more prolactin than masturbatory orgasms, according to a contempo report.)
Oxytocin and vasopressin, two other chemicals released during orgasm, are also associated with sleep. Their release oftentimes accompanies that of melatonin, the master hormone that regulates our body clocks. Oxytocin is also thought to reduce stress levels, which again could pb to relaxation and sleepiness.
What virtually the evolutionary reasons for post-sexual activity sleepiness? This is trickier to explain. Evolutionarily speaking, a man'southward chief goal is to produce every bit many offspring every bit possible, and sleeping doesn't exactly help in his quest. But mayhap since he cannot immediately run off with another woman anyhow — damn that recovery fourth dimension! — re-energizing himself via slumber may be the best utilize of his time.
And although there is alien data as to whether women feel sleepy after sex, a woman often falls comatose with the homo anyhow (or uses it for some key cuddling fourth dimension), which is good news for him: information technology means she is not off finding another mate. When the man wakes up and she's yet there, he just might be ready to go again.
It's too possible that sleepiness is merely a "side event" associated with a more than evolutionarily important reason for the release of oxytocin and vasopressin. In addition to existence associated with sleep, both chemicals are besides intimately involved in what is called "pair bonding," the social attachment man mates unremarkably share. The release of these encephalon chemicals during orgasm heightens feelings of bonding and trust between sexual partners, which may partially explicate the link betwixt sex and emotional zipper. This bond is favorable should the couple have a baby, as cooperative child rearing maximizes the young one'due south chances for survival.
The lesser line is this: There are many potential biochemical and evolutionary reasons for post-sex sleepiness, some direct and some indirect — simply no one has nevertheless pinpointed the exact causes. Ane affair, however, is sure: we females amend get used to it, because information technology doesn't wait probable to modify anytime soon.
I will leave frustrated American women with one terminal thought: if you are upset at the ubiquity of the post-sex snoring miracle, remember that things could exist a lot worse. A recent survey of x,000 English language men revealed that 48 percent actually fall comatose during sex.
Talk about coitus interruptus!
This answer is provided by Scienceline, a projection of New York University'southward Science, Health and Environmental Reporting Plan.
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Source: https://www.livescience.com/32445-why-do-guys-get-sleepy-after-sex.html