Naw.. If you had been on /jp/ you would have seen they keep track of a few (japanese) traps.
They're just androgynous.
Actually, there are a lot of androgynous people (I know some friends and I actually am, too).
It's a whole different matter that people would actually crossdress then, look convincing and try to hook up some males. I think that part is what is more or of a plot device than those guys looking like girls
Pic is from a japanese TV show where girlfriends convince their boyfriends to crossdress and get rated (presumably to get money?). You can easily find it on youtube.