How to treat the phenomenon that some college boys have long hair and tied their hair (ponytail) in recent one or two years?

If this is an art school, this phenomenon is understandable. If it is a non-art school, it is a bit neither fish nor fowl for boys to wear long hair and ponytails. Even some people feel like buffoons, and their clothes are different. In appropriate occasions, wearing clothes can make everyone feel happy, and in inappropriate occasions, it will make people around feel uncomfortable. Don't talk about yourself. This has nothing to do with ego. Should belong to a kind of.