Confession: Last year my girlfriend was living in a 3 room college apartment with 2 other girls, one of them pretty hot, petite with C cups. I didn't go over there much, but one weekend the other 2 both went home so I spent the night. Once my girlfriend was asleep I started checking out the other girl's room and stole a pair of panties. Each room has its own bathroom, and in her's I saw a bottle of face lotion. I took the bottle and went to my GF's bathroom in case she were to wake up, then uncapped the bottle and jerked off directly into it. Later that night I jerked off onto a loofa sponge thing she had in her shower.
I hung out with that girl many more times when I'd go out with my girlfriend, and it was awesome knowing my cum had been all over her face.