Playing into how slaves are especially...Like that might not be the best choice for how I worry for them, but then when a thing needs even heavier brainwashing than usual I like them even more.

Having a slave who, lets say gets in their equivalent of a relationship fight: Sobbing, ugly crying, having to be heavily restrained not only because it does her mind good to have that part of her indulged, but so she cannot hurt herself further. The morning after, it would be good to help her calm down by ordering some extreme therapy. Getting a special leash, with a chain long enough to let her move maybe a half-step away from your grasp. Maybe.

Spending the entire day with Master's grip actively ruling over you. All the domestic toil, done with his warm body up against yours. No privacy, not even for Master, your yandere bitch brain even gets to follow him into the bathroom. Every quiver, every nervous sob, done with Master's rule over your entire reality more visible and real than you could ever hope for.

Maybe that would help a slave understand how permanent her situation is. God I just want to comfort a nude slave on my lap while she ugly cries for 4 solid hours, life isn't fair.