A Funny Food Joke
Children do not often know where food comes from. Therefore, the jokes in the adventures of Practical, Fiddler, and Fifer were not favorable to them. Here, the three pigs had hung photos of their father on the wall.

Source: Reddit
If you remember the photos, they were not of a big and fat pig. The images were of sausage and ham. As adults, we know where ham and sausage come from, so the joke makes more sense than it did back then. It’s never too late to laugh, though.