"a lesbian practice in which one partner lies on top of the other and simulates the movements of the male in heterosexual intercourse."
That isn't what they're doing. They're not simulating anything - in fact, it's something you can't do with a man at all, because the point is to rub your clitoris on the other woman's, till you both reach orgasm. And, you don't have to be a lesbian to do it, because I hate to burst your bubbles, but these things aren't so cut & dry. Sex with someone of the same sex does not automatically make you homosexual, bisexual, or lesbian. Because sex is not love, and sexual orientation is a lifestyle choice, not something you define your entire life by because you decided to do something once that felt really good at the time. That means it was just fun. So, hmm, let me think....
"a sexual act between two women in which they grind their pelvic regions, specifically their vaginas, together to reach orgasm."
THAT'S what tribadism - aka tribbing, scissoring, grinding - is. You're welcome.
That isn't what they're doing. They're not simulating anything - in fact, it's something you can't do with a man at all, because the point is to rub your clitoris on the other woman's, till you both reach orgasm. And, you don't have to be a lesbian to do it, because I hate to burst your bubbles, but these things aren't so cut & dry. Sex with someone of the same sex does not automatically make you homosexual, bisexual, or lesbian. Because sex is not love, and sexual orientation is a lifestyle choice, not something you define your entire life by because you decided to do something once that felt really good at the time. That means it was just fun. So, hmm, let me think....
"a sexual act between two women in which they grind their pelvic regions, specifically their vaginas, together to reach orgasm."
THAT'S what tribadism - aka tribbing, scissoring, grinding - is. You're welcome.