What is the purpose of long hair?

The purpose of long hair is just for beauty nowadays, and having short hair is actually healthier, to prevent dandruff and head lice, but the purpose of having long hair naturally is to keep your brain warm during cold times, because having a cold brain can cause very bad problems. that is the exact same reason animals grown long hair in the winter, then shed in the summer. the best way to keep your hair healthy is to grow it in the fall and winter, and keep it short in the spring and summer.