Ren & Stimpy: The Lost Episodes S01 E01 Onward and Upward

"What They Wouldn't Let You See When You Were A Kid!"

Tired of living inside a homeless man's mouth, Ren and Stimpy, presented as a sexually-involved couple, move to the inside of a spittoon after Stimpy pools his secret stash of money into it and proceed to "live the high life" consuming the bodily fluids of barflies. (Wikipedia, 2023)