>>936809241 (OP)
It was summer and I was in junior high. Dry humping objects had been a pleasurable habit and I was very confused by suddenly being able to actually blow a load. I kind of knew about jerking off, but hadn’t really tried it.
There was a very cute girl in my grade named Haley who lived in my neighborhood. I was deep in the friend zone. There was another girl in our grade named Katie. She was the first girl in our year to grow boobs and they weren’t mosquito bites. We’re talking milk trucks. Her mom had big tits, so I guess Katie was just genetically gifted.
Haley called me up one afternoon that summer and invited me over to jump on her trampoline with her and Katie. Not an uncommon invite. I tried my best not to stare at Katie’s big, bouncing tits, but it was game over for me when she announced her boobs had bounced out of her bra. Haley kind of bullied Katie for having big tits, which turned my semi into a rock hard erection.
I excused myself, ran inside with my hands in my pockets to try and hide my boner, went straight to the bathroom, locked the door and just gently rubbed my cock like 3 times before I dribbled out some cum in Haley’s toilet. I was so embarrassed, but it felt fucking amazing.