"Now imagine that, here in the U.S., we demanded that men cut into their urethras, or sliced off parts of their testicles if they were "uneven" or "too big." But we wouldn't force them into it, of course - we'd just convey, through media and social pressures, that not doing so would make they ugly and undesirable."

Now, I think demand is somewhat of a strong verb, mostly because the government isn't sending an SS squad to slice up any woman's axe wound (currently). However, the other extreme of male improvement does exist in the US, mostly because I get at least 20 e-mails a day about it. However, there are no drugs out there even proported to 'enlarge your vagina' (at least that I know of). But I believe the ideal is still there. Don't have a big penis, and you can't get a girlfriend (or at least one of those girlfriends with a sliced up crotch). The same social pressures are there for males as well as females, although perhaps a bit diluted.

Just my two cents.

Also, have you ever considered a career in Sociobiology?