'Naked and Afraid' -- Your Bathtub Is My Toilet

The contestants on "Naked and Afraid" don't have the basic luxuries of life ... like a separate bathtub and toilet -- so necessity being the mother of invention ... they've combined both.

The new season of the heavily-blurred Discovery Channel show premieres Sunday at 9 PM EDT... and we got hold of a clip showcasing the delicate balance between the need to bathe and the need to pee.