I am a 13 year old boy and I started masturbating last month. I used to masturbate once a day, but now I do it once every two days. Whenever I do masturbate, I get a really good feeling in the tip of my penis and then my erection starts to spasm before my glans hurts. It only hurts when I rub my foreskin though. After this happens I stop, and I can't touch the top if my penis for about 5 minutes after this happens. The pain is not constant and it is NOT a burning sensation. If anyone has any ideas about what is causing this, please answer as soon as possible.
Many Thanks
Anon