His only friends were two pets he had at home. One of them was a chihuahua, who, despite being aggressive with strangers, was friendly with his owner. The other was an extremely obese cat who slept a lot, and often ate his own droppings. The boy often drew cartoons of the two doing stuff together, and having weird adventures.
When the boy was a teenager, the chihuahua attacked a child, and had to be put down. A short time later, the cat died of heart failure. Both animals were buried right next to each other.
The boy was depressed; the only things left of his two friends were those cartoons he had drawn, so he decided to do something with them.
Years later, after he had grown up, he went on to become an animator, making an award-winning cartoon series out of his two deceased friends. The boy? John Kricfalusi. The show? Ren and Stimpy. [[Main/Jossed]]. Stimpy was based off a cat John would constantly doodle in school, and Ren was based off a chihuahua he once saw in a postcard.