I think you **** it cuz you never know how it will feel to have foreskin. It protects your cockhead and keep it sensitive so you can enjoy more during sex.
It can get cheesy sometimes but it's only the dead skin of penis. Cut penis have it too it just dry out on your underwear. If you wash everyday it's easy to clean.
Foreskin is the protection that mother nature give man to protect their penises. It's just like you eyelid protects your eyes.