Many people think life follows a certain pattern.
Meet the love of your life. Get hitched (or not, depending on your proclivities). Somewhere along the line, find a house. Then fill it with sprogs, batten down the hatches, and weather the storms life might throw at you, snug and secure in a safe place of refuge.
When children arrive, your home will no longer be your castle. Instead, the introduction of infants is accompanied by a host of unforeseen intruders. Sadly - for a few years, at least - there's no getting rid of these home-raiders, without disturbing the natural order.
Here are some of those child-related interlopers: