So I've had a new friend for a few months now, an older retired expat here. We hang out about once a week at a bar, eatery, or pizzeria...and always have a good time and good convo. Really nice guy and our wives have become friends, too. But I've invited him over a few times and he always has an excuse as to why he can't come. Well, yesterday he admitted that he isn't comfortable visiting the homes of other people. I didn't push the issue, as he seemed uncomfortable discussing it. Sounds like some sort of controlling behavior, anxiety or neurosis. Is this a real thing? Or is he just a nut? Anyone you know like that?