fistfucking

Fisting—also known as fist fucking (FF), handballing, and brachioproctic or brachiovaginal insertion—is a sexual activity that involves inserting one or more hands into the rectum (anal fisting) or the vagina (vaginal fisting). Fisting may be performed on oneself (self-fisting) or performed on one person by another. People who engage in fisting are often called "fisters".

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