Haha don't think you will be able to find out unless you talk to them. Hopefully you will find out before the "action" begins. =)
Wtf? I'm gonna assume that the OP has either A) some odd sexual fantasy or B) he was chatting to a chick that turned out to be a Shim. KP
My question is why do those "shims" - as someone just put it - try to "trick" people into thinking they are female, can't they just go find other people who like that? Nevermind, don't wanna know.
You will find out when you bring em home and get some private time! Or you can try to meet real women in real life rather than on adult dating sites! Or are you looking for the ladyboys?