For men, as I'm sure you are well aware, coitus results the release of their reproductive material. Women on the other hand experience coitus independently of the reproductive function. With a capability for repeat coital events within a short period of time, or so I've read. Regardless, from a plumbing standpoint, women are build in that area for pleasure far more than men.
I don't think that assertion is supported at all - it's one of those fuzzy evolutionary psychology 'just so stories'. It doesn't connect to men having sex for emotional intimacy. Nor does it explain the behavior of women, simply because most women don't get to have orgasm during sex.
And men can have multiple orgasms without ejaculation too.
Not really against the grain as much as you'd think actually. Women tend towards sex in committed relationships more than men while with men there is a tendency towards sex just for fun.
Both sides are simply describing what they feel they are lacking in their current sexual encounters.
Hrm, maybe. Nonetheless it is interesting that women seek sex for sexual pleasure whereas men seek it to 'connect with their partner' or whatever, because stereotypically, the gender traits are the opposite of that.
If only we had a more reliable kind of data (like actual behavioral observation).