I actually do have several systems for buns since buns live in different ways. I'll get back to you that one since I don't have time atm. I WILL get back to you though!
And they don't have a problem with homosexuality, in general, but they are aren't down with gay marriage. They take a more "conservative" approach to marriage as it's for building communities and raising children. One thing they do, as we do IRL with animals, is "pedigree breed". So they would marry someone for the sole purpose having children being "purebred". So someone in the GCAT system would get a wife to make sure that some of their children are "purebred" and thus be more marriageable. You see the correlation in IRL, yes? It's something that upper class twits mostly do too much but every does it to some extent.
Also, a good article on gay animals.
Homosexual behavior in animals - Wikipedia
Plus, just for you! Gay Giraffes: The Anime!