I walked into my 13 year old son masturbating well he was actually ejaculating but since then he acts like he's ashamed around me and I don't want him to act like that. I started when I was his age although I was never caught, so I don't know fully what he is going through. I tried talking to him and saying it's ok to do that, it's normal, but he still walks around and avoids eye contact with me and even conversation. What should I do to get him back to the son I knew?