My thought was that he was either trying to hit on you or figure out what was going on or what you were in to.
My husband and I were at a club and some dude started rubbing on my CD'ed husband's leg - trying to be real coy about it. He didn't realize that I was the wife. Anyway, my husband backed off and I just considered the dude a pervert. Pervert continued to try to talk to my husband. Husband then introduced me to the pervert and the guy apologized and said that he was just a dirty, old man (I agree). Those type of men seem to think that if another man is in a dress, they are fair game for a funky time.