I don't remember a specific moment of, "Oh, what are these things?", but I went from being totally flat at the beginning of the 7th grade (age 12) to a B-cup by the end of the 8th grade (age 13). I had a C-cup by the end of the 9th grade and a hefty pair of DDs by the 12th grade. Now, as a 20-year-old junior in…