A very good questions and i cant help with agree with all the answers given. It is just how we are wired, I believe we just have a very strong feminine side and wish to express it, wearing womens things is the easiest way, but im sure many of us express it in other ways also. I feel so wonderful when i dress, i feel sexy, and alive! I am so glad we have a place to share that with others. May never answer why, it just Is!