Over the years it has become my firm opinion that sexual activity (even if only through masturbation) is "requisite and necessary, as well for the body as for the soul"; for men and women alike. It stimulates your glands, exercises your pelvis, thrills your nerves, brings mind and body together as one, and culminates in an ecstasy in which there is neither past nor future nor separation between self and other. We need that as we need vitamins, proteins, water, and air.

Alan Watts, The Red Thread of Passion by David Guy