When you've been sitting on the toilet so long, you cease to have any feeling or control of your legs.

When a woman gives a man a handjob while the two are simultaneously shitting in a two-seater outhouse.

When one has to deficate in a public restroom and realizes the toilet paper dispenser is empty after they have deficated, the person then proceeds to stand up (typically with pants down around their ankles or pulled up loosely to prevent poo-residue from getting on their trousers) open the stall door and shuffle to the next available stall in hopes of finding a stall with a toilet paper dispenser that has an adequate amount of toilet paper.