Explaining Anal Depth playing Depth Training is. Anal Fisting in General is the practice of inserting the fingers, a hand into the anus for sexual Pleasure.  Anal Fisting in General is the practice of inserting the fingers, a hand into the anus for sexual Pleasure. Anal Depth Fisting is typically, We consider depth fisting anything where you get fingers or hand through the second ring to Sigmoid colon or deeper. The fister can elbow deep before reaching into the door of the sigmoid. this part of anal fisting is also known as Deep Fisting. Anal depth training or deep anal depth playing is the pursuit of sexual pleasure with toys or hand pushing into the depths. Unlike some anal sex activities, anal depth training does not pay attention to how big or thick the objects placed are, just how far they come into the body.