How do you know if your son is a perv?

well he probably is just a normal teenage boy, and most teenage boys are pretty excited about there new found sex drive, but i guess if he is just being completely out of line, then he needs to be put in check. its important for anyone to be classy and you dont want your son going around making a mess of his reputation, so if you get a feeling hes crossing a line, you can consider it, and even if you dont, it wont hurt to say hey i just wanna give you some advice, one of the most important things for you to do as a man is be classy, everyone will appreciate it and you'll have something to be proud of, so go out there and make yourself proud! hope this helps : D