I wouldn't know where to start, and to be honest I'd be surprised if many city fans could tbh.
There's a bit more to it than making a sponge though tbf, but anyway, like I said, it's harmless, trivial, nonsense. Light entertainment.
I'm sure there's a thread on a baking forum somewhere that can't understand why a bunch of grown men spend a fortune watching other grown men kicking a football about.