Obviously, for reproductive purposes, sex hzs to be pleasurable. The question is therefore, why is the multi-orgasm so hard to achieve. Well, that may not have been an issue before circumsicion (full fore-skin helps a women hence "ribbed" condoms). Also, sex was probably a source of entertainment. With no TV to distract you, it's possible sexual partners did it a lot for a prolonged period of time. About it being "multi": why not? Singular makes less sense if its meant to produce pleasure, and its only singular in man because once it happens reproduction can begin (hence further orgasms are redundant for just one ejaculation).

Just because you can't do it Joe, doesn't mean no on can.

I am pretty sure the conclusion was that it allows the semen to be pulled in farther therefore increasing chance of pregnancy.

According to Sperm Wars by Robin Baker, female orgasms are used to either help or hurt the passage of sperm up the cervix. If the woman orgasms 1-2 minutes before the man does, all of the mucus in her cervix will have been expelled, making it easier for the sperm to swim up said cervix. Any longer, and the cervix will be swamped with new mucus, making it harder for sperm to go up.

To summarize: it allows women's bodies to decide whether or not to become pregnant.

I don't know but I'm a light sleeper so it doesn't affect me ;)

I HAVE NO CLUE BUT IT SOUNDS LIKE THIS GUY LIKES TO GET QUEEFED ON