If your scatological curiosity has yet to be satisfied since you first saw the destructive Stallone sci-fi flick DEMOLITION MAN, maybe this will help answer the perplexing “three sea shells” used for futuristic bathroom hygiene (but not by John Spartan).
I-Mockery took the time to extrapolate comments from Stallone himself (given in an interview a couple years back), illustrating how those baffling metallic bum devices might work. Click for all the steps, but — WARNING: NSFW artistic representation of human poo is contained within.