I didn't realize that Gays and Lesbians weren't acceptable in gaming. I see them both in all sorts of games, and I have no issue with that, other than I'd prefer not to see sexual themes of any kind used in the games I play. It's misued in gaming quite a lot, and I'd prefer they kept that sort of thing private, because it's a very intimate and personal experience that shouldn't be cheapened.
Math problems are the ultimate trick question. No matter how straight forward and simple they seem, the answer is never what you think it is.
Lesbians are hardly ever in video games, but they don't generate as much contraversy and the character is treated with a lot more respect than if it were a gay guy. I cannot think of really any gay character who is just a regular guy. It's mostly them being all "LOL stereotypical gay guy, sewwww hilarious" (Enchanted Arms, Valkryia Chronicles, etc.).
Granted that may just be because there aren't as many lesbians in games. If there were more they may just be a bunch of macho masculine lesbians.