Hmm, I'm not so sure that romance is a dress or whatever, a charade. I think that love has become, or I assume that it has *become* since animals don't AFAIK exibit love, part of human nature.
Even if you and your spouse are incapable of procreating, or even if you just have no intention to, love iws one of the most powerful and dare I say, basic emotions. I mean basic as in, when you start stripping away logic and reason, and start going towards animal nature, I would say love would be one of the last things to go.
I think that homosexuality is not so much part of the procreation instinct as it is the pleasure instinct. Obviously, two people of the same sex aren't going to be procreating, so I think that its part of the human instinct that finds sex pleasurable. My theory is that, without any social inhibitions and conditioning, people are naturally bi. Of course, I find the thought of sex with a man disgusting, and so I guess to most of you ('cept anon and Tiara), but I'm not really certain that I was born that way. Kids generally have much less inhibitions about who they're "playing around with" than adults, so it stands to reason that its society that imposes the "straight" view on people.