The linked between "going bad" and becoming more sexual is also somethimes used as a shorthand for more reserved male heroes.

In Superman 3, for example, when Supes is "turned evil" by red kryptonite he gets very sexual and dominating with women. I seem to recall the same thing in Smallville.

I'm trying to remember, doesn't Angel also manifest more attractive clothing and stronger sexuality when he turns into Angelus?