PLEASE TELL ME HE HAD A SUIT ON
cause if I looked out my window and saw some naked hairy dude climing into my hot tub (dont have one but that isn't the point lol) I think I'd throw something at him - did the guy even ASK ???
that's not being a baby or overreacting and I'd make HIM clean it so you can use it yourself. Men can be pretty inconsiderate but that's really out there just helping himself to something that personal.