What are some universal things or jokes or events that would be funny to everyone?

The things some people think are funny I just don’t get. Bodily function jokes for one, or jokes about sagging boobs, stuff like that. There are some friends on fb who will post a video saying it’s funny, and I won’t bother to look because I know that I wouldn’t enjoy it or think it’s funny. There was a video of this contortionist who gave the illusion he had his head physically up his butt. They were just rolling. I shook my head and turned the thing off.

I know that some of the things I think are funny others wouldn’t think are funny.

So what are some things that are universally funny, and why?