I swear, where do human beings come up with jokes? I mean, really clever jokes.
Dogs have jokes, but they never let on that they're joking; that's part of the joke. Even cats have jokes, and fish have special jokes only understandable to themselves. Forget about it, you will never see the humour in a fish joke. You can try, and I can try, but the old "Why are fish wet all the time? Why don't they take a bath and dry out in front of a warm fire with a cognac" doesn't work for fish.
But the cream of the crop is the " . . . goes into a bar" joke. Who the hell came up with the concept, and why is the bartender always this hapless dope, and his first name is always "Bartender?" Why isn't his first name "Neil" or "Adam", and by the way, why can't she be a she, this being an equal-opportunity world? (Oh, okay, then she would be the "bartendress." Or not).
But anything involving the word "penguin" to me is funny, so here's the joke:
A penguin walks into a bar, goes to the counter, and asks the bartender, "Have you seen my brother?" The bartender asks, "I don't know, what does he look like?"