If try to play bdsm restraint or bondage play to get the helpless feeling or turn you on in bedroom or outdoors, Open Mouth Muzzles is a good device to help finish the bdsm or bondage. 

for a good dom, know how to femdom the slave pet, to make the good slut experience, make her to call help, that will be a good scene to have a movie excited thrilling feeling.

it‘s a necessary bdsm gears for dom to play, the sub can bind your arms or wrist to finish the bondage play. 

It is a good match for blindfold with eyes, arm bonded or arm binder , with helpless or begging for Squirm out sensual sensitive sex adult time.

Notes: Please don't hurt yourself or others.