You describe what defines sexy, IMO. It doesn't have to be blatant, just an openness shown through your words, actions and sense of humor.
A lot of us HDs (M & W) have undoubtably been shot down unmercifully for making sexual innuendos, followed up by attempts to make us feel guilty for making them. Consequently, we don't make them any more.
Sexy has a lot to do with just being yourself and allowing someone else to do the same. (And being willing to come up and drop to your knees doesn't hurt, either. )
Mike - I used to be myself, but that didn't work. Now I'm somebody else. That doesn't work either, but there's a lot less fighting in the house because of it.