Retrieved 19 January For other uses, see Bdsm bondage gag. The ball is strapped into the mouth behind the teeth, with the straps going around the head to secure it in place. A ring gag is similar to a ball gag, except that the ball is replaced by a hollow ring. Gags may be classified as over-the-mouth type, bdsm bondage gag stuffing type or mouth opening type. One rests on the lower teeth of the wearer while the other is against the top. While such a gag of thin material is not very effective, a thick scarf can be used to hold his or her mouth open. Restricting movement of bdsm bondage gag jaw and covering the cheeks can both increase the efficiency of a gag. Wikimedia Commons has media related to Gags.