Answer:
idek, (._.`)
Explanation:
but i think it might have to either do with the popularity of the person who started it, or how much everyone likes whatever they're doing. just my thought.
Answer: Because they're scared of showing weakness
Explanation: Now this one may seem a bit out og the ball park but when I was in school, people just always stuck with a certain crowd. Everytime they weren't with the rest, their weaknesses would show.
