My dad and a 2 of his brothers (9 kids total), were like that. Get them together and it was a comedy routine. Hence my wife's conviction that it's genetic. When I got older it was great fun when they were around.
I am not as familiar with Cook & Moore as I am with The Pythons although I have seen their work on occasion, e.g., "Bedazzled" and some reruns. They weren't as popular here as MPFC, I don't know why, they definitely were good enough.
Duane