Masturbation is not physically necessary. There is already a way by which the male system relieves excessive spermatic fluid quite regularly through the nocturnal emission or wet dream. Monthly menstrual flow expels the female's egg and cleanses the womb. For both sexes, physical or emotional tensions can be released by vigorous activity. Thus, in a biological sense, masturbation for either gender is not necessary. In a gospel sense, it is a sin: Masturbation, a rather common indiscretion, is not approved of the Lord...regardless of what may have been said by others whose 'norms' are lower. - Spencer W. Kimball