Happily married in reality, bisexual cross-dresser in fantasy?

I'm a happily married man in reality, but I'm also a secret cross-dresser. (Full disclosure: I'm secretly wearing my wife's panties, bra, and sheer blouse right now.) Sometimes I get pretty excited by fantasies about revealing my secret feminine self to men and doing sexy things with them. But I don't want to do any of that stuff with men in reality; it's only the fantasies that excite me. What do you think this tells me about myself, and what do you think I should do about it?