Loser's Guide to Life
One of the funniest things I can think of is how people who have no sense of humour are so darn touchy about having no sense of humour. If you accuse them of it, they're nettled: They do too appreciate funny stuff. They laugh at things, just not at weird, incomprehensible things. They like a good chortle as much as the next person, but, you know—it should make sense.
For example, if it's Friday and there is some minor problem at work, then you say, “Oh, well, it's FRIDAY!” Or if someone has a child, then there are a lot of things to say about that, something ... can't recall just now. Then there are taglines that everyone needs to be familiar with. Use as needed. I mean, the list goes on.
I think they like a well-ordered universe (and don't we all?), and would like to think that their model of it is correct, but most likely it's not. Most likely, our conceptions of the world are ridiculous. Therefore, there is probably a giant surplus of potential humour all around us, if we only make the effort.