is it normal for a 13 year old boy to only pee outside
no, not unless your toilet is broken. you need to ask him why he is peeing outside.
he has had some kind of shock or something. not a doctor but it sure is not normal to go out side to pee.
Only peeing outside is not a normal behaviour, just wondering about when you’re at school or if the weather is bad do you still go outside.
Is there an excitement you feel from doing it like wanting someone to see you or hoping to get caught?
Is there a reason why you just pee outside like not comfortable using the washroom in the house?
It would probably be in your best interest to work on changing your washroom habits as the older you get the more doing this may be a problem.