I'm still in my teen years (18 in a few weeks) and I've been masturbating since I knew how to (around 11-12 years old). I was wondering if it could have caused any problems since I do it usually 5 times a week, sometimes more and sometimes less. I've heard it can cause ED and that it also can make the size of it smaller? Is any of that true? Should I stop masturbating or do it less often? I'm really not sure and the internet is full of sites that say the total opposite of what others say, so I'd like someone's opinion.
PS: Is it possible to undo any possible damage and is there a chance my penis can still get bigger?