Few years ago, I accidentally saw one of my prettiest friend topless. We were on a holiday and was sleeping on a different bed. It was 3 girls, and 2 guys. They 3 shared one bed and we 2 shared one bed.
One night, I woke up to pee and saw my friend scratching her neck while sleeping. She unknowingly scratch underneath her shirt and left it there. I realised all of them didn't wear bra to sleep and I just stared at her topless for a long time. Wanted to touch it but was afraid she will wake up, so just went to toilet to jerk it off
To top that holiday off, I saw one of the other girls boobs as well when she bent down to pack her luggage in front of me. I will never forget her long nipples.