In a sense, nearly all jokes are repeats after a fashion. Genuine joke-inventors are rare beasts, so we have to resort to mass-borrowings. Unfortunately, not only can Donuel not invent jokes (like the rest of us I suppose, though most of us, unlike him, have the sense not to try), he doesn't know what a joke is. Dictionaries are available. Here's another of my oft-repeated Tim Vine ones:

I was on the Big Dipper on Blackpool Pleasure Beach. Half the time I was laughing my head off and half the time I was in floods of tears. It was an emotional roller-coaster...

Another thing that I like about jokes is that they gradually change in the telling down the years. They undergo a joke folk-process!