Possibly he has a broken neck and was unable to turn away, or he thought you were very attractive
He was horny and you were there.... you were the subject of a male response. mx:))
Maybe he is wondering why you were looking at him?
You are so awesomely gorgeous he couldn't take his eyes off you....<br />
or funky looking, only or the other, or maybe you just look like someone he knows
Was he a Creepy McCreeperson, or some ridiculously gorgeous guy?
Most of today's men don't have any manners.....
maybe he just thought you were that attractive