Masturbation is the stimulation of one's own genitals or the genitals of a partner.
Studies have shown that even babies rub and play with their little private area. They do this subconsciously because it feels good. This good feeling is in the DNA of all humans. We are taught that our Creator is Perfect, so this is part of His Perfect Plan.
Many women and men do not realize their full sexual capacity. Masturbation provides the class room for private or mutual learning through hands on practice. Any person can learn to develop his or her orgasmic capacity.
Masturbation allows one to control stimulation. With minimum practice multiple orgasms can be routine.