Well, it amused me.
Bob and I are currently having an ongoing debate about the merits of the Serial Comma [aka the Oxford Comma, or Harvard Comma] If you want to know about that, look here.
It is the comma before the ‘and’ at the end of a list.
I use a pen, a pencil, and a typewriter.
I think [but no doubt Liz, who I regard as the family expert on all matters of punctuation, will put me straight here] that it only needs to be used when the sentence is ambiguous without it.
He dedicated the book to his two ex-wives, John Lennon and Paul McCartney.
He dedicated the book to his two ex-wives, John Lennon, and Paul McCartney.
As a child, it concerned me to hear people reading the Christmas story, and saying that the shepherds hurried off…
and found Mary, Joseph and the babe lying in a manger
…a very crowded manger!