Cindy,
what you relate seems pretty much my own story.
I guess it may be explained in more then one way --- but then SO WHAT?!
Though not passing 101% I think some guys get plain scared, don't quite know how to deal with that. Maybe being attracted but not quite sure TO WHAT exactly?
Also, on principle (and by nature) I'm not a natural walk-over like lots of females my age, given the different socialization? Tend to ask questions, friendly, but not quite in general girly repertoire.
So, I may easily come across a butch, dressed femme, dyke.
To boot, if word got around before hand, say to the plumber, by a mutual male acquaintance, I be a butch femme-trans-dyke?
Hey, now THAT be plenty enough get most normal dudes head in a spin. YMMV
Axelle