Masturbation is the act of stimulating one's own erogenous zones (most notably the vulva —including the clitoris/labia/vaginal-opening— in females, the penis in males, and the nipples of both genders) with the aim of sexual self-gratification, whether alone or in the company of others. Masturbation need not conclude in orgasm.
This tag is typically not used when the masturbation in question is part of another sex act, such as bukkake (see forum #79127).
Crotch rubbing is often used as a method of masturbation, especially by women. Other sex objects may be used (usually by women), such as vibrators, dildos, etc. Men sometimes use artificial vaginas or other sex toys, as well. Both sexes can also use their hands, alone.
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