Masturbation is defined as the self-stimulation of the genitals to achieve sexual arousal and pleasure, usually to the point of orgasm (sexual climax). It is commonly done by touching, stroking, or massaging the penis or clitoris until an orgasm is achieved.
When it comes to shaving your face, there is no right or wrong to it (assuming you do it correctly, of course); it is all a matter of preference- Dermatologist Estee Williams, MD.