Ariadna trains her portable human sink. She sits on the slave's chest with her full weight (66kg / 145lbs) and cleans the teeth. Of course, she spits a nasty toothpaste and her own saliva inside the slave's mouth and then coerced him to swallow all this stuff. Alex must be grateful for any spit and didn't wrinkle when swallows it. Ariadna cleans not only her teeth but also a tongue. For the slave it's not an easy task. Not only because Ariadna's saliva have a very specific taste and the toothpaste is burns his mouth, but also because it's a pretty heavy weight domination.