Redsock stimulator

To punch the partner during anal or vaginal sex in the side to induce groin tightening. Usually done from behind so the partner will be surprised and cannot anticipate such action. Once your partner has tightened up that's your opportunity to go to town or pull out during anal sex to induce a red sock to even the loosest of sluts.

Jimmy: I was railing out this hooker the other day and I paid $100 extra for anal.
Danny: Damn was it worth it
Jimmy: At first it was like throwing a hot dog down the hallway but than I gave her the old Redsock stimulator.
Danny: You've made me proud little bear.