Tribbing or tribadism, also recognized by the slang expression scissoring, represents a sort of mutual masturbation in which one girlfriend rubs her vulva against her partner's body, generally implying female-to-female genital contact for sexual arousal. One girlfriend sits on her buttocks, plus spreads her legs, with one leg extended outward, and the other leg with the knee raised. Now, the other partner slides in between the first's legs with one legs extended outward under the other's raised leg and her other leg with the knee up over the first's extended leg. Both of them come close enough to provide contact between one another pussies / clitorises, and then grind away. Hands plus fingers can naturally be used during this sex position too.