I found the evidence. Your Parents and what blew their hair back.

I frequented a male friends home and we used to play around with the neighbor girl, we were around age 10 to 12 ? Doctor games and genital touching was normal. one day when my friends mother went out shopping we started exploring in his parents bedroom and found a few pics of a man and woman fucking. After getting over the normal thrill of the find I realized the couple in the photos was my friends mom & dad, that got us more excited. i at least had a dry orgasm from the girl rubbing me trough my pants. After that i can remember getting really excited every time I saw his mom. I always thought his mom knew we were playing around with each other and could care less if we saw the photos.

My sister and I grew up in a sexually open home so nothing was surprising to us. Our parents always showed us the loving and pleasurable side of their their activity and encouraged us to enjoy our bodies. As mentioned elsewhere our home was nudist, so we saw much that helped our understanding of healthy sexuality.

I found my parents stash of dirty dime novels in the night stand along with a box of condoms when I was 12 or so. I read the books when they were away and took a condom once not knowing what they were used for. Somehow my dad figured I was reading the books. All he said was "I think you're a bit young for that.."