When Joel fails to tidy up after making a peanut butter and jam sandwich (the ultimate snack for the modern athlete, according to Joel), our couple discover that they have fundamentally different approaches to this finely-tuned appliance: for Joel, it's a strategic challenge that deserves focus and discipline, while Katherine prefers to let nature take its course. Let's just say, she's a "lobber".

All of which, gets us on to the dubious story of a supposedly carefree Scottish character who may, or may not have lent his name to the phrase, "willy nilly".