https://www.hollywoodreporter.com/news/general-news/bob-saget-dead-full-house-1235072029/

This is remarkable lazy writing. Norm himself has said that the jokes came from a book of jokes from his Dad. And here's Saget's take:

When I got roasted [on Comedy Central], I talked to him a week before the Roast and he called me and he said, ‘Uh, Saget, I can’t say mean things about you, you’re my friend. I don’t even want to do it, but I’m going to do it because it’s you.' ... We’d gone through so much together, ups and downs. So at the roast, he called me a week out and said, ‘I’m just gonna read jokes from a '40s joke book,’ and I said, ‘Norm, that’s fine. I mean, you know what you’re doing, but you gotta curse.’ ‘I don’t want to do that.’ I said, ‘Well just throw in an arbitrary ‘fuck’ now and then.’ ‘Nah, I’m not going to do that.’