Fish hook refers to the BDSM practice of using blunt hooks to keep a submissive's mouth open. The hooks are positioned at the corners of the submissive's mouth. The objective is to make the person feel vulnerable. The fish hook-opened mouth is open for anything. Usually, the fish hook is used to make oral sex feel more exciting and intimidating.
The ends of fish hooks are blunt. However, they can still cut when used for a prolonged period of time. Likewise, the wearer may feel extreme discomfort if his or her mouth has to be subjected to oral sex, too. The dominant person has to be extra aware of the partner's well-being. Since the submissive doesn't have use of his or her mouth and cannot speak, one needs to agree to a gesture that replaces the safe word.
