When you're taking a dump, yet the smell is completely unfamiliar to anything that's ever come out of you before. It will almost feel like a Stranger came in and shit in your toilet with you still on it.
When an indivitual cuts off the circulation to their hand till it grows numb, then procedes to masturbate. Thus creating the sensation of another persons hand on the genitals. "Also referred to as the stranger efect."
I was boredlast night, but after sitting on my hand for a while, had a long talk with the "stranger" about cleaning my pipes.