What is tribadism?

Answer 1

awesome reference on tribadism:

http://www.tribgirls.com/EN/information2/AboutTrib.asp#3

Answer 2

Tribadism or tribbing, also known by the slang term scissoring, is a form of mutual masturbation in which a woman rubs her v***a against her partner's body for sexual stimulation. This may involve female-to-female genital contact or a female rubbing her v***a against her partner's thigh, arm or stomach; it can also refer to a masturbation technique in which a woman rubs her v***a against an inanimate object such as a bolster, in an effort to achieve o****m. The term is most often used in the context of L*****n s*x, but is not exclusive to lesbians.

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