I'll simply say this.
You can have the body of a male and at the same time dress in the clothes of a female without wanting to be female or feeling you should have been born female. Some do it because it feels nice, some do it simply because they like it, and some have a fetish for it. But that's just how I see it. I could be wrong, I don't know. Transgender is just one of those terms that is all over the place..