Every participant has "hard limits" (things they will never do). These are discussed extensively before any play begins.
A Mistress who incorporates "toilet slave" themes into her lifestyle is typically focusing on . This is the psychological process where a human being is treated as an inanimate object or a piece of furniture. It requires a high level of trust and a clear understanding of "Safe, Sane, and Consensual" (SSC) guidelines. The "Toilet Slave" Lifestyle: Service and Humility
Many engage in these roles only during specific "scenes" or sessions. The entertainment comes from the theatricality—the costumes, the scripted dialogue, and the heightened tension of the power gap.
For those curious about the lifestyle and the entertainment value found in these power dynamics, here is a look into the mechanics of this specific subculture. Understanding the Role of the Mistress