One example could be a story about a little girl who finds a lost puppy on her way to school. She takes it to the local vet, and they manage to find the owner. It's a simple yet heartwarming story.
First, think of a simple idea or event, like a cat getting stuck in a tree. Then, develop it by adding characters, like the kind neighbor who tries to rescue the cat. Finally, give it an ending, such as the cat being safely rescued.
It can vary a lot. Sometimes it's very accurate, showing all the important parts and details. But other times, it might be simplified for easier understanding.
It could be that the caricature memes remind you of past experiences or emotions that bring on the urge to cry. Sometimes the way they're presented or the themes they cover can have a profound impact on your feelings.