What is mouth ball?

Mouth ball is a kind of fun prop ball invented by Japanese, which is worn by masochists in SM. Different sizes, generally made of silica gel, the two ends of the ball are connected with belts.

The picture is similar to the one below.

? When using, only the abuser will wear the mouth ball, but the abuser will not. Put the ball into the abuser's mouth, so that the abuser will lose the ability to speak and can't swallow saliva smoothly. After a long time, saliva will flow out of his mouth, increasing the excitement.

But personally, it is useless, and it is not good to wear too much, which will cause harm to gums and oral skin tissue.