Can someone explain to me how come many peoples like "masturbation"?

Natural activity: This would be a great time for you to talk with some sensible people about your body. Essentially all men do this beginning as teens, and a majority of women; it's a normal behavior that helps people learn about their bodies and stay comfortable and able to do other things. There are superstitions and some of the sects try to impose guilt and confusion. It should be your choice.

Being a human: Part of the human experience is being a sexual being. Nature has designed this to ensure reproduction. But, in medical terms, life and health are enhanced by sexual activity. It is good for love, for mental heath, and is both normal and common. Masturbation is perhaps the first entry humans have to their sexual lives. All men you know have or do masturbate. And, most females do as well.