This character engages in masturbation.

Masturbation refers to sexual stimulation of a person's genitals, usually to the point of orgasm.

The stimulation can be performed manually, by other types of bodily contact (short of sexual intercourse), by use of objects or tools, or by some combination of these methods. Self masturbation is a common form of autoeroticism. Masturbation with a partner, called mutual masturbation, is also common.