In church one time, a person sat so close, they may as well have been sitting on my lap. It was quite the nightmare for me. Another time, on a plane ride, this guy moved the arm rest up and made himself very comfortable on my seat too. Not only am I afraid to fly (don't get me started on my fear of flying), but now my space has been violated too. I will never forget that flight. I think I wrote about it before. Will have to check again.
Anyway, the reason I started talking about this was because my friend just called me and talked about someone who kept touching her every time he was trying to make a point in conversation. They weren't in a bar (cause then I would tell her that the duded was drunk), they were not friends, they had just met at a conference. Oh wait, in a conference, maybe he was drunk. Point is, he would touch her shoulder, slap her in the arm, point at her chin or put his finger to her forehead. She didn't know what to say except "have you lost muscular control"? And he didn't get it, he just said "why" and then touched her shoulder again.
Why do some people have no idea about this space concept?