Fisting

Fisting is a human sexual behaviour that involves inserting the entire hand, and sometimes part of the arm, into the vagina (vaginal fisting) or anus (handballing or anal fisting) of a sexual partner. The medical terms for these practices are brachiovaginal eroticism (vaginal) and brachioproctic eroticism (anal).

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Often, fisting does not involve forcing the clenched fist into the vagina or anus. Instead, all five fingers are kept straight and held as close together as possible (forming a beak-like shape), then the hand is slowly inserted into a well-lubricated vagina or anus. Once insertion is complete, the fingers either clench into a fist or remain straight, but in more extreme forms of this practice, such as "punching," a fully clenched fist may be inserted and withdrawn.

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Sexual behaviour: REDIRECT Human sexual behavior...

Hand: The hand (med./lat.: manus) is the portion of the arm or anterior limb of a human or other primate, where the appendage terminates. This part of the limb is especially used in grasping and holding. Each hand is a mirror image of the other....

Arm: ARM may stand for:...