It’s your job as a parent to teach your kiddos these sorts of things. It might feel uncomfortable, but it is part of the deal. It’s your job to teach him all of these personal hygiene issues. I taught both of my children (boy, girl) these things. For some general info I had to do a lot of research on boy things, as I don’t have those parts. But I did it and we’re fine. This doesn’t just apply to hygiene but all those life skills we aren’t just born with.