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.
For circumcised males, on whom the glans is mostly or completely uncovered, this technique creates more direct contact between the hand and the glans.
To avoid friction, irritation and soreness from this resulting friction, some may prefer to use a personal lubricant, masturbation cream or saliva.
This type of stimulation is typically all that is required to achieve orgasm and ejaculation. Male masturbation techniques may differ between males who have been circumcised and those who have not.
Since the muscles of the anus contract during orgasm, the presence of an object holding the sphincter open can strengthen the sensation of the contractions and intensify orgasm.The glans itself may widen and lengthen as the stimulation continues, becoming slightly darker in colour, while the gliding action of the foreskin reduces friction.This technique may also be used by some circumcised men who have sufficient excess skin remaining from their circumcision.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.were common in early modern times and are still found in modern dictionaries.