From Demolition Man
[whispering to Lenina
] Look, I don't know if you guys know it, but uh... you're out of toilet paper.
] Did... did you say toilet *paper*?
Um... they used handfuls of wadded paper back in the 20th...
[Lenina, Alfredo, and Erwin all laugh
I'm happy that you're happy, but the place where you're supposed to have the toilet paper, you've got this little shelf with three seashells on it.
He doesn't know how to use the three seashells!
[Erwin continues to laugh, then calms down
I can see how that could be confusing.