At least 3 big ones come to mind with me.
1. When I was 12: I somehow injured myself on the cap area and it hurt so bad that I told my parents I zipped my dick up accidently so that I could go to the doctor. He said it was bruised pretty badly and to leave it alone. I couldn't touch it for 1 week,
2. When I was 14: I chaffed it so badly from a 4 in a row pleasure-myself-a-thon that it was pink and raw and I screamed my ass off when i got in the shower. I couldn't touch it for two weeks.
3. Two weeks ago: I have big calices on my palms from weight lifting and sometimes hard dead skin hangs off where the calices are. One of these pieces of dead skin lacerated my dick as I was masturbating, causing massive bleeding and excrutiating pain. It still hurts a little.
I like masturbating.
