When MoneyPrincess Victoria decides to share, she does it in grand fashion. Her slave has been denied water for an hour because he is on punishment. She didn't want him to suffer anymore so she put water into her mouth. Instead of swallowing, she spit it back into the cup for her slave to drink. It's hot in the punishment box so he will have to drink her spit water if he wants to quench his thirst.
When Lady Velvet starts to train her slave, she shows him all the things that he could be rewarded with. She strips down to her bra and thong, showing him the round curve of her ass. She tells him that when he is rewarded, she may let him smell her ass or she may let him play with her spit covered tits. She spits on her chest and lets it roll down her chest so he can understand what she means.
When she looks for a slave, she knows what he wants. She knows what will drive him insane with the desire to bow to her wishes. She knows that he wants her warm, slimy spit. She is happy to sit in front of a potential slave and spit into a jar. If he doesn't want to play in her spit, she knows that he is not the slave she needs. When she finds him, he will give her anything to get that warm jar of spit.