[7] The vibrator was originally invented for the treatment of hysteria in Victorian women through medical orgasm induced by clitoral massage[citation needed].
These early mechanical devices were much larger and more powerful than the modern vibrators; they were first used by physicians and became popular in bath houses in Europe and the US towards the beginning of the 20th century.
[9] Modern sex machines on the market include vacuum pumps, instruments that deliver calibrated electrical shocks to the nipples and genitals, and life size inflatable male and female dolls with penetrable and vibrating orifices.
The conference Arse Elektronika regularly features demonstrations of sex machines and academic debates about these devices.
In 2009, a woman from Maryland required a medical evacuation after the blade of a homemade sex machine cut through the plastic dildo and caused severe vaginal injuries.