People Annoy Me.

Today I was at the mall and some chick walks up to me with, I guess it was her boyfriend because she was hanging all over him, just to inform me that I look like a female. Now I get that I probably look a bit feminine, but then her "boyfriend" continued to say that I should lose the binding. At first I didn't understand that comment but upon thinking about it I realized he was saying I was binding my boobs. That is obviously untrue, or at least I thought it was obvious. So I started asking around with my friends, come to find out, they all thought at one point that I was female. I'm not sure if that is because they met my twin sister before they met me or if I really do look like a female. What do you guys think.?