Well, for what it's worth, I crossdress because something inside me demands it. It completes me in some way. I'm not a woman on the inside, or a man. I'm just me. And "me" consists of many male and and many female attributes to my being simultaneously.
And sometimes, not always, I can derive a great deal of sexual gratification from it, too. I think most crossdressers do. It's likely your husband does, too. But it's unlikely that it's the only, or even the primary reason he likes to dress.
