Grrr, know what you mean. Try this sometime: you're standing talking to two women in the office, one of whom is the hottest single senior fox in the office, when senior fox turns to other woman and says, "Oh, don't worry about [you], he's a sweetheart and a gentleman -- he's completely safe!"
I spent the next couple of minutes explaining as gently as my blood pressure would allow, that that is absolutely the worst thing you can say about, or to, a single man. Sort of like, "oh, it's okay, Bucky Kat doesn't spray -- I had him fixed!"
Oh, yeah - I know what you mean. Of course, I mentioned my sense of humor. A woman I know was giving me the brush off and said "Bob, I've always thought of you as a brother..." to which I replied, "Well, this is East Tennessee..." It took a couple seconds to sink in...