I always say ain't no such thing as a good looking, educated,single man. He is with someone, wife or girlfriend.
I was having drinks a while back and one of my single friends said to one of my married friends, "You have nothing to worry about with your husband. He never tries to flirt or respond to flirts."
To which my married friend said,"How would you know, are you checking for him to do that with you?"
They don't speak to this day.
I am single and fairly attractive so I always downplay my sexuality when I am unsure of someone's dating status because I don't want no trouble. When I do date or interested in someone, it is because he has expressed interest in me.