Most Helpful Guy
He's a creep. Move away from him when he does stuff like that. It's normal if you don't already have a girlfriend and like the woman, but I would guess he just wants some sex on the side from you.
Most Helpful Girl
some people are just more affectionate then others, it sounds like he likes you and wants your attention, and most probably wants to sleep with you, but you never know he could just be really affectionate, does he do it to other women?