How do your educate your teens boys? My boy is 14yo and i caught him erecting and kept shutting himself behind doors. He doesnt use computer and his phone is always locked. What should i do?

Have a sincere heart to heart talk with him. Teens need a patient a loving set of parents to help him navigate this challenging time in their life. Also, it would be good for him to have friends to Socialise with. Maybe not using computer and phone being locked also cuts away his connection with friends and outside world. The key is to talk to him to understand what is in his heart