Several
females
curb to
sexual pressure regardless of the amount of
pleasure that they actually get from the
act, though. While the
psychological reasons and
reinforcement in
having lots of sex are important, there is also a lot of
important (and kinda really
fascinating)
physical processes
happening that increase the chance of
fertilization.
Approaching
orgasm, a
woman's
cervix dialates, which facilitates the
passage of
sperm into the
uterus.
(Don't forget the "purpose" of sex is having babies.. or something..) Also, the
shape of the
vaginal
cavity actually changes
slightly to make
deeper
(again, get into that uterus!) penetration possible.
Finally, during orgasm the
muscles
surrounding the cervix
spasm; the
contractions force the cervical
opening down into the
semen that's hopefully been
ejaculated nearby.
There is also the
matter of NumOfOrgasms: that
women can more readily have more than
one. The cervical
spaz isn't going to do much
good without any
cum around, so the female orgasm must take
place later in the
coital process. The possibility of
many orgasms increases the
likelihood that they will
coincide with the
presence of semen.
Multiple orgasms will also
prolong the
period of the cervical exposure to the
sperm pool.
Fortunately, techonology is high enough that sophisticated techniques of preventing these evolved traits from doing their jobs have been developed.
That way, the "reason" for female orgasm is fun... or anything you want it to be.