When performing sex, doggystyle, in ass of female, you pull out. Then you insert indexfinger of both hands in her pussy and both longfingers in her ass at the same time. You then pull out and smear "war paint" on her ass, and then on your face. Insert dick in her ass again, and while thrusting you make high indian war cries.
When I did a dirty Indian on my girlfriend, she prayed to the Spirit in the sky.