Just look inside or give them a drink of...something
Studs give a nice look
Leather piss gag for toilet training or any training where the mouth has to be forced a little. The hole is rendered to be very accepting of introduced fluids - cum, piss, whatever with this sort of gag. Retching or gagging when first training a toilet can be an issue so watch for this. With this gag installed they will have no alternative but to face facts and accept the waste.
