Tribadism, or tribbing, is a lesbian sexual practice in which a woman rubs her vulva against her female lover's vulva, thigh, butt, or other body part for sexual stimulation. It's a sex act that nearly every lesbian practices at some time or another even if they don't call it tribbing. Some lesbians seem to think of humping, grinding, scissoring, or tribbing as strictly foreplay. Tribbing does make for great foreplay, but it doesn't have to end there. Here's how to have an orgasm from tribbing.
