Oh, all right, blogging actually comes from somewhere else—this is part of the answer to a question from Henry Ernest Dudeney's Amusements in Mathematics, which, like tens of thousands of other books, is online for free.
Joseph Bloggs: "I can't follow it, my dear boy. It makes me dizzy!"
John Snoggs: "It's very simple. Listen again! You happen to be my father's brother-in-law, my brother's father-in-law, and also my father-in-law's brother. You see, my father was––"
But Mr. Bloggs refused to hear any more. Can the reader show how this extraordinary triple relationship might have come about?