Masturbation is the sexual stimulation of one's own genitals for sexual arousal or other sexual pleasure, usually to the point of orgasm .  The stimulation may involve hands, fingers , everyday objects, sex toys such as vibrators , or combinations of these.   Mutual masturbation (mutual manual stimulation of the genitals between partners) can be a substitute for sexual penetration . Studies have found that masturbation is frequent in humans of both sexes and all ages, although there is variation. Various medical and psychological benefits have been attributed to a healthy attitude toward sexual activity in general and to masturbation in particular. No causal relationship is known between masturbation and any form of mental or physical disorder. 
Masturbation has been depicted in art since prehistoric times and is mentioned and discussed in very early writings. In the 18th and 19th centuries, some European theologians and physicians described it as "heinous", "deplorable", and "hideous", but during the 20th century, these taboos generally declined. There has been an increase in discussion and portrayal of masturbation in art, popular music, television, films, and literature. Today, religions vary in their views of masturbation; some view it as a spiritually detrimental practice, some see it as not spiritually detrimental, and others take a situational view. The legal status of masturbation has also varied through history and masturbation in public is illegal in most countries. 
In the West , masturbation in private or with a partner is generally considered a normal and healthy part of sexual enjoyment. Animal masturbation has been observed in many species, both in the wild and in captivity.   
The English word masturbation was introduced in the 18th century, based on the Latin verb masturbari , alongside the more technical and slightly earlier onanism . The Latin verb masturbari is of uncertain origin . Suggested derivations include an unattested word for penis , *mazdo , cognate with Greek mézea μέζεα , "genitals", or alternatively a corruption of an unattested *manusturpare ("to defile with the hand"), by association with turbare "to disturb".  
National Masturbation Day , also known as International Masturbation Day , is an annual event celebrated on July 21,    to protect the right to masturbate . The first National Masturbation Day was observed May 14, 1995, after sex-positive retailer, Good Vibrations , declared the day in honor of Surgeon General Joycelyn Elders , who was fired by President Bill Clinton for suggesting masturbation be part of the sex education curriculum for students; she was terminated on December 9, 1994.  
International Masturbation Day has since been expanded to include the entire month of May as International Masturbation Month .   
If there's one thing that almost every guy is an expert at, it's masturbation . After years of extensive, hands-on experience, you think you know everything there is to know. But according to the experts, maybe you don't. Here are some that may surprise you.
"It appears that not all orgasms are created equally," says Tobias S. Köhler, MD, MPH, an associate professor at Southern Illinois University School of Medicine in Springfield.
Study after study shows that intercourse has all sorts of benefits for men -- for your blood pressure , heart and prostate health, pain, and more. You'd think that masturbation would, too. But it doesn't.
Why would it make a difference whether you ejaculate during sex or on your own? No one's sure. But your body seems to respond differently. Even the makeup of semen is different if you masturbate instead of having sex .
National Masturbation Day, also known as International Masturbation Day, is an annual event celebrated on July 21, to protect the right to masturbate.
Masturbation is the sexual stimulation of one's own genitals for sexual arousal or other sexual pleasure, usually to the point of orgasm. The stimulation may involve ...
WebMD explores some little known things about male masturbation and answers questions such as: is masturbation safe, normal, or unhealthy?