of an O-ring in front of the gag strapped to the back of the head will hold the butterfly gag in place. Cleave A more effective variant of the over-the-mouth gag is called the cleave gag. Instead of being tied over the person's mouth, the scarf or cloth is pulled between his or her teeth. While such a gag of thin material is not very effective, a thick scarf can be used to hold his or her mouth open. Cleave gags are difficult to remove as they are between the teeth, not over the mouth. When it is applied properly, the gagged person's speech is muffled, but not completely silenced. Detective / over-the-mouth (OTM) The detective gag, or over-the-mouth gag (sometimes abbreviated to OTM), is often described in fiction (particularly crime serials) as preventing the subject from speaking through the use of soft materials such as scarves or bandannas. The long scarf or bandanna is pulled over the subject's mouth and tied at the back of his/her head. In practice, it does not silence the subject very effectively. Images of OTM gags, usually applied on women, had been prevalent since the film serials of the early 1900s. For this reason, the OTM gag is associated with the typical damsel in distress. OTM gags are often combined with stuff gags to make them more effective in silencing the wearer. Bandit / over-the-nose (OTN) A bandit gag (also known as an over-the-nose or mouth gag) covers the mouth as well as the nose, and is commonly used in Japan and on many cartoons. Without stuffing, it is not very effective. Forniphilic A forniphilic gag is a type of gag that has the primary purpose of objectifying and/or humiliating the wearer. The term forniphilic comes from the word forniphilia, which is the incorporation of a bound person into furniture or other objects. The gag becomes a mounting point for a tool or other device which allows a slave to perform a task or service for their master or mistress. When employing the gag, the slave's hands are usually bound behind them so they have no other option than to control the tool with the gag. In order to provide stability and to allow the slave to control the tool, a muzzle gag with a mouthpiece is commonly used as a base for attaching the tool. Types of tool or device can include the