I also like to watch fit men naked but I end up wanting to be like them and feeling jealous about their attributes.
This is the type of "jealously" attraction I often talk about. It's actually pseudo-homosexuality (not true homosexuality). At heart, you're not really attracted to men. You're getting off on the competition, and when you can't "keep up", you feel attracted to fitter, more well-hung men as you really want "to be" them (you get also get off on feeling superior to other men, too). All that said, it's not in the same way you'd be attracted to a woman, sexually-speaking as, for you, that is a more pure form of attraction ; that is a + & -.