What's the biological reason for a man's body to induce sleep after s*x? Woman slip away? Fix him sandwich?

Question

LOL! I hope you are not taking too much offense, ladies, I'm just making light of this classic situation of what happens after s*x. The man usually wants to sleep or get something to eat (he's worked up an appetitie). The woman wants to cuddle, light up a cigarette, talk about their relationship, whatever. Isn't it amazing, Guys, that before you get married, she's MORE THAN HAPPY to go fix you a sandwich after performing but after the knot is tied -- FORGET IT MISTER! FIX YOUR OWN...and DON'T MESS UP MY KITCHEN!

HA!

No but seriously, there is some chemical released in men's brains after they achieve climax which induces sleep. I'm not sure if that is unique to men or if it happens to women, too. If this is more of a male phenomenon, I'm wondering what Mother Nature was up to by inducing his sleep while she stays awake. If she was a cave woman drug to his den, his sleeping after s*x might afford her chance to sneak away, right? Survival of the fittest (or sneakiest)?

Answer 1

Evolutionarily speaking, a man's (or any organism for that matter) entire reason for living is to pass his genes onto the next generation.   Once a guy has delivered the DNA, he has (potentially) completed his entire reason for getting up in the morning.  So since MISSION ACCOMPLISHED, why not go back to bed, the rest of the day is only going downhill.

edit: and as to your hypothesis about giving the cave woman time to sneak off....that would actually be counter intuitive to her survival.  If she becomes pregnant and starts getting big she won't be able to provide/gather enough food for herself + baby without the support of a man... if anything its to give her some time to get out there and start finding reasons for the guy to stick around (other than to ensure that his offspring makes it to reproductive age. Otherwise he'd be a reproductive failure.)

Answer 2

I thought we wanted a cigar

Answer 3

He needs to allow time for his sperm to migrate up to the egg.  He can't do anything else to help them along. It is best from a biological standpoint if he leave her alone for a while and allow them to do their job.

Answer 4

The guy is drunk.  Besides it hard to breath with the bag on his head...  The girls bag usually slips off after s*x and all she wants is to talk.

Answer 5

your heart has to work extra hard to get your blood in one area so it is easy to get exhausted