Are you intact? If not, the dry and cracking skin is a callus, just like on the bottom of our foot. Your glans has been building up that callus all you life. It is from rubbing on your undershorts and anything that your glans comes in contact with. That is one reason why circumcision harmful your sexual health. With intact men the glans and the inner skin of the foreskin is lubricated with natural fluids. I hope this helps.