mutual masturbation
sexual stimulation
masturbation
masturbation
306.772
317.1
http://homosaurus.org/v2/masturbation
http://id.loc.gov/authorities/subjects/sh85082015
https://homosaurus.org/terms/masturbation
Note that this definition of masturbation does not include acts of mutual masturbation.
RC560.M3
HQ447
onani
Sexual stimulation or gratification of the self.
manustupration
masturbation, NOS
onanism
peripheral excitement
mutual masturbation
68 Sex Slang Words You Should Know
Encyclopedia of Homosexuality
The Wiley Blackwell Encyclopedia of Gender and Sexuality Studies
Sex-Lexis.com