No, it's not wrong, IF you don't let someone think you're a female playing a futa, and let them believe that for a long long time. However, it is assumed that futa are men by the greater majority of women and men. So revealing your sex, irl, would really come as no shock to most. However, if you like someone and they like you, who should tell them early on what you are irl if you don't say in your profile. Some people don't give a fuck AT ALL about rl though, this includes the identity of the person controlling the avi. They don't care if the person is male is female, they're just there to have fun, and fuck nonstop. So, my answer is, tell the people you like, don't bother telling random fucks. Not everyone cares. People that are there for fun don't want to know you so don't bother telling them, you'll get a reply like, "aw, thanks for telling me...fuck you some time soon."