People don't normally take a shit in a toliet that doesn't have proper privacy, therefore the toliet has poop dreams. The toliet is made to handle a deuce but just isn't getting any.
Man that toliet is never used, it has poop dreams.
Person One: Have you heard of poop dreams ?
Person Two: No describe them.
Person One: Dreams a toliet has when no one shits in it.
Person Two: Oh yea, the toliet at work has poop dreams.