So this is a question that I never really thought I would be asking on MN. Curiosity has now got the better of me. I had a discussion with my DM recently and she said wouldn't ever have a poo in someone else's house. To be honest, I haven't found myself in a situation where I've been in someone else's house and I've really needed to have one. I usually only go at home or in the workplace toilet. If I was on holiday I would go in the hotel bathroom, or if I was on a plane or train I would use the toilet there. I would basically have one anywhere if I really needed to, as most people presumably would, but there is something about going in someone's house other than my own that makes me not want to.
Is there a certain friendship or relationship threshold that you need to be at with someone to be comfortable with it? For example would you go in a close friend or family member's house, but not someone who is just an acquaintance? I probably wouldn't want to in any of those scenarios.