Devices can be penetrative or extractive. The term fucking machine is generally used to describe a penetrative machine which works by the transfer of rotational or reciprocating force from a motor to a directional motion on a shaft tipped by a dildo.[2] A hand-held modified reciprocating saw device is sometimes called a fucksaw,[3] a hand-held modified drill motor rotating device is sometimes called a drilldo,[4] and a modified jigsaw is called a jillsaw.[5] An extractive device works like a milking machine and can be attached to the penis, breast, or other body part.[6]
^Leung, Isaac (2009). The Cultural Production of Sex Machines and the Contemporary Technosexual Practices. In Grenzfurthner, J. et al., eds. Do androids sleep with electric sheep? Critical perspectives on sexuality and pornography in science and social fiction.RE/SEARCH, ISBN978-1-889307-23-7
^Farrell, Lauralee (2007). Dream Machine. In The Best American Erotica 2007, p. 2077. ff., Susie Bright, ed. Simon and Schuster, ISBN978-0-7432-8962-7