Fisting is a sexual activity that involves inserting a hand into the vagina or rectum. Once insertion is complete, the fingers either naturally clench into a fist or remain straight. In more vigorous forms of fisting, such as "punching," a fully clenched fist may be inserted and withdrawn slowly. Fisting may be performed with or without a partner, and is enjoyed by people of all sexual orientations.
Can not be directly applied to visual novels.