I only did this one time.... but it was GREAT. In HS I had long hair (the 70s), was entering a dressing room when a "daddy" walked in just as I was closing the door. Asked me if I was interested in seeing his cock. I had sucked friend's cocks before, so I said yes. He was in his 50s, large tummy, and 7-8" cock. I sat on the bench in the dressing room and he grabbed me by my hair, fucked my mouth and filled it with cum. It was soooooooooooooo exciting. Always hoped it would happen again, but never did.