If you want it really dirty and nasty, check out mud wrestling on Porn-Monkey.com. Men and women, barely clothed, throw dirt at each other and get all over each other. You get to watch them wrestle and toss each other around for free. In the porn videos the winner gets a reward: he gets to fuck a slut, often dragging her into the ring and smearing her with mud too. Porn clips show them bathing in the muck, with the slut smearing her pussy and tits. Lesbians also battle in the mud, squeezing each other's tits and having fun with mud wrestling. Afterwards they shower and rinse off the dirt.
