In Class.
I am sitting in class, in the seventh grade (age 13 at the time). I was sitting at the table, and a pretty girl kept leaning over. She had on a loose fitting shirt on, revealed the nicest nipples, for a girl who was just starting to develope I got hard and started to play with myself. Within a few minutes I ejaculated in my underwear! She looked at me and smiled. I stood up and she saw a wet spot and a semi- hard penis. We met later that day. More details to follow next time...