I don’t really understand why people are being told to bugger off if they don’t find the joke in the OP funny. Or told they don’t have a sense of humour. The OP invited people to contribute which, to me, suggests that they understand not everyone will find it funny. Some did. Some didn’t. And that’s ok. My first comment was a bit abrasive I suppose, but it wasn’t personal. The OP wasn’t the originator of the joke. They just found it funny.