I was teased in the 10th grade. After swimming, we were lined up, nude, waiting to get out towels, and I got an erection. Everyone teased me about it, and I was totally humiliated because at the time, I didn't know how to deal with it. Probably I should have told them that they were just jealous because they couldn't get such a big erection. But, at that time, I was shy, had no self-confidence, and was easily embarrassed.
Later, when I was a preppy, guys would say, "For such a little guy, he sure has a big cock." It is sufficiently bigger than average to attract attention.