Please tell me: What is crossdressing? Is it a psychological illness? Is it a sin? Is it a fetish? Is it a perversion? Is it a kind of bizarre way of getting oneself off? Or is it just a way to relax? Is it a way to get in touch with one's feminine side, perhaps? Or is it an indication that one has a subconscious desire to transition and live life as a woman?
If you can answer that question for each individual here, you need to hang out a shingle and start doing therapy.