As strange as it sounds, the idea that a straight man might not want to date someone with a penis, or a straight woman someone with a vagina has now come under fire. I know many activist who are trying to bring up the conversation about transgender individuals and dating preferences are doing so with the intention of being inclusive, but if you ask me, their arguments sound all too much like those spouted by conversion therapy advocates...
I think the major issue is the misunderstanding of what gender actually is. That and the fact that they care more about how they're treated then how they treat others. You could never say any of that stuff to a gay person.