Tell me a joke.

There was an illiterate Obasan who came from the countryside...

Then one day, he came to a certain city. Halfway through, I suddenly felt a stomachache. So he walked and searched to see where there was a WC. After walking and walking, Obasan came to a movie theater. He thought this was the WC and walked in. The staff selling movie tickets said that one ticket costs dozens of yuan. Obasan thought that a piece of toilet paper cost dozens of yuan, so he felt so distressed! But there was nothing I could do, the pain was excruciating, so I decided to take out the money and buy a movie ticket.

When I walked into the movie theater, the ticket tearers tore Obasan’s movie ticket in half. This time he felt even more distressed. I thought: How can such a small piece of paper be enough? There's nothing I can do, I can't bear it anymore! Obasan walked in. The movie started and the lights were turned off. It was pitch black and it was hard to see who was doing what. So, that Obasan also started... After it was over, he wiped it with the half-sheet of "toilet paper". As a result, a man sitting behind him said: "Sir, your roasted sweet potato fell on my feet."...