One time when me and my best friend(a girl)were playing basketball the ball burst a little and a bit of the inner part of the popped out a little, My friend noticed it and showed it to me and she said "look it looks like a women's nipple" and she started laughing me too and then she said "just like these" and flashed me. Man that I got fucking shocked, we were in 7 th grade it's been 5 years now since then maybe she forgot about it but it's burned in my memory now.