I personally think it's maybe because he has no idea of personal space. Like a lot of men, he thinks it all belongs to him. I mean how can he not understand how awkward that is.
I've generally met two kinds of men that do this. One is trying to be intimidating or thinks it's sexy. I'm not sure how likely that would have been in this scenario on tv though, given the person knows what they are doing they usually don't do it when people in authority are watching.
The other is a type of person who is clueless about social norms, and usually has other odd behaviours. But if it were that he'd probably do it all or much of the time, which as far as I know isn't the case.
My sense is that he's really too close and weird to just be a regular close talker - they are closer than normal but not that close IME. And he doesn't come from a place where everyone is a close talker.