We had a kid crying on the field to be subbed out. Was he hurt? What was the matter you ask? He was hungry. He was also 13 years old. My son called him a *****. He finally understood why I was adamant he tough things out.
My own son was a pretty good athlete, especially weight-lifting, but he had a good dose of science nerd in him and he had several nerdy friends. One thing I was most proud of was that none of the other jocks would dare call one of his nerdy friends a ***** because they didn't want to mess with him.