Masturbation can be defined as self-stimulation to cause sexual sensations. The use of the word masturbation usually suggests that the person is manipulating his or her genitals to the point of intense pleasure or orgasm. (Orgasm refers to a period of intense excitement in which genital muscles enter in to a series of highly pleasurable contractions or movements.)Recently, studies have even suggested that frequent masturbation in men may help to decrease the risk of developing prostate cancer. While these findings are by no means proven, the possibility of preventing such a prevalent disease through the very common activity of masturbating holds great promise.A good orgasm is one of the best ways to lift somebody's spirits and make that person feel once more the zest for life that lies in all of us. Sex also tends to drive out negative thoughts, if only for a while. In the end, whatever arguments some people can raise have against masturbation, it far is better to engage in this practice than to allow depression to set in.Some of the known health benefits of masturbation are:Reduces stressEnhances self-esteem.Muscle relaxationHelps one to fall asleepPromotes release of the brain's opioid-like neurotransmitters (endorphins), which cause feelings of physical and mental wellbeing.Female masturbation relieves menstrual crampsEases some of the symptoms of premenstrual syndromeRelieves depressionImproves blood flow in the human body.Frequent masturbation by males appears to help prevent the development of prostate cancer.An effective, natural cure for insomnia.Masturbation is considered as cardiovascular workout. However it has not been scientifically proved.Burns calories during the session.It lowers blood pleasure and relieves headaches and muscle aches throughout the body.Frequent masturbation helps a person understand his or her own sexual desires and is a very good way of exploring one's sexuality. For young people or shy people who are nervous about the act of sex, the self-knowledge gained from masturbation can be a great asset later on in life to help make intercourse a more pleasurable experience. Masturbation is also perfectly safe for people of all ages and, unlike sex, it does not carry the risk of unwanted pregnancies or sexually transmitted diseases.Masturbation has been wrongly blamed for a host of human ills, including, blindness, stunted growth, madness, physical decrepitude, sexual perversion, reduced sexual function and neurotic disorders. A myth that lingered for more than centuries is that girls don't masturbate. However girls and women do masturbate. In fact, it is said that women who masturbate have higher self-esteem than those who don't.