When I was a twelve year old boy, I used to rub my penis against my bed and feel pleasure in doing it. But I could not tell what that pleasure really... Show More
Most Helpful Opinion
It depends on the girl -- when her cycle's about to start and how developed she is. There's no fixed age. Many girls don't even think to try that until way, way after they've been having periods, etc. I know several girls who have never tried to find out at all, for reasons of their own.