I was 12 when my sister married this high school jock. I was staying the night at their house when I cut my finger, she told me to knock on the bathroom door and ask my brother in law for bandage. He told me to come In and get it from the medicine cabinet. As I was getting the bandage the shower door opened and he stepped out, I just stood there staring at his naked body and huge penis. I had never seen a grown up guy naked, I was so amazed and turned on at his six pack abs, his black pubes, and his huge penis and testicles. I think this is when I realized I was Bisexual, before I left the next day I sneaked into the clothes hamper and took his breifs he had worn that day before. In the weeks following I would come home from school put them on and fantasize about my brother in law while I masturbated.