This morning I went to have my eyes tested, and upon entering the shop was dealt with initially by a fragrant young man with a pleasant manner and a strange haircut. He invited me to sit down at a desk, enquired as to the reason for my visit, and prepared to enter my details on his computer. So far so good. He then said "So how has your day been so far?". This threw me. With living the simple televisionless life that I do, I had not met the question before when posed by a stranger, so all I could think of by way of reply was "Mustn't grumble".
How is one supposed to reply? Do you say "Well, actually I got up a bit late, then had a bit of struggle with the lid of a new jar of marmalade which set me back a bit so I was late switching the kettle off before it filled the kitchen with steam, and after that it's just gone from bad to worse", or what?