Entering bathroom meant only one thing: whatever you do in there, you have to take your clothes off. When taking a shower or bath, it makes sense. It might make sense too, for example, when changing into pyjamas. But for me, it made complete sense to take my clothes off when all I had to do in the bathroom was take a pee.
It was extremely unpleasant in winter months, but there was no other way of doing it.
Did you have any such quirks as a kid that would be totally inappropriate now as an adult?
Until next week, cheers! - Mojca