>>8 >and >10 there's a bit of a difference between personally insulting a person due to a spelling error and just pointing out that it bugs you, which I feel wasn't taken to extremely in this case, I mean to say this in a polite way, so don't take it wrong. just don't dwell on them pointing it out.
As for why women don't get the same treatment, I think several valid points have been raised, but maybe an addition to it would be that within our society, women are seen as submissive and sort of take a back seat in the minds of most individuals, whereas men are viewed as dominant people who, as mentioned before in this thread, are supposed to be masculine and set an example, and because they are seen as the front of our culture it is a lot easier for a person to ridicule them for an out-of-norm actions such as engaging in homosexual behavior.
Another strong possibility is the fact that I think subconsciously (with men at least, i can't speak for women at all) we find the idea of two women together somewhat erotic. To put it in a more biological scope for the male, it's simple logic 2+ women mean more babies, 2+ men means no babies, it seems to us like a senseless act.
Also, i guess i'll give religion an honorary mention.