Can you tell me if masturbation has side effects on health or fertility of male?

It does not: I'm sorry anyone troubled you with this. People who want to frighten you or make you superstitious will tell you it will make you short, hairy, smooth, stupid, ugly, an unfit partner / parent, bald, insensitive, unspiritual or whatever. They're lying. It's actually a natural way to stay comfortable, be able to do other things, and learn about your mind / body in preparation for adult roles.