When I was in 7th grade, the girl who had gym locker next to mine had the body of a Playboy centerfold (that was the only example then). Twas quite depressing for me. She could have easily passed for 18 physically.
I went all through school with a girl that was the first to develop notable breast size. It was first notable in sixth grade. For many years we road the same bus but I moved a few miles and that quit in eighth grade. I was the youngest guy in our class and she was the girl who drew the most stares. Years later in college we went out on a date together and had a wonderful time. We chuckled about what our school chums from six years prior would have said about us as a couple.
Adolescence is difficult.