When I was in high school, I dated a girl who was a trombone player on the band. Some days when I couldn't drive her home, I would drop her trombone of at her house so she wouldn't have to carry it on the bus.
When I was there and had the house to myself, I would go through her underwear drawer and check out her panties... she had a really big butt. :)
Sometimes I would even drop my pants right in the middle of the house, masturbate to her pictures, and rub my hard dick on them.