Masturbation
Masturbation is a sexual practice of provoking sexual pleasure by stimulating the genitals or other erogenous zones, usually with the help of hands, or sometimes objects such as dildos or other sex toys. Masturbation is practiced by almost all mammals, but especially by all primates. The social attitude towards auto-erosm changes according to the epochs and according to the cultures. In the West, masturbation was particularly repressed from the 18th to the beginning of the 20th century. For cultures related to the Bible or the Koran, it is a sexual activity considered a "sin", to such an extent that the mutilation of its specific organs is frequently performed. Currently, masturbation is recognized by sexology as a "normal" sexual activity as the others.