Cum-piss is a term used in the adult content industry to describe a specific fetish or kink involving two primary elements: cum and urine. In this context, "cum" refers to ejaculate produced during sexual activity, while "piss" refers to urination. The tag indicates that the porn video features scenes where either one or both of these bodily fluids are involved, often in combination. This could involve characters engaging in sexual activities and then urinating, or potentially a focus on urination as an erotic act itself. As with any fetish or kink, this is not for everyone, but it has a dedicated audience who enjoy the particular thrill of these elements being incorporated into adult content