How does masturbation work with a penis?

I'm 14. Can someone explain to me how masturbationForeign word for masturbation or masturbate. works? I don't understand how it works. I have such pressure in my penisPenis is another name for the penis and, together with the scrotum, is one of the external male sex organs. The penis consists of the shaft and the glans. The glans is the most sensitive part of the male body and is covered by a foreskin, u...