If college students are found to have too long foreskin by classmates, will they laugh? What should I do in the shower? What's dormitory life like in college?

As long as you are confident and don't care about others, they dare not make fun of you.

It's hard to imagine that if one person makes fun of another person's foreskin, how can there be a face college?

Don't worry, no one will read or comment on other people's places unless they are bored to death. If someone really makes fun of you, you should give him an ugly face!