Back when I was a teenager, my parents owned a pub. It had a few TVs mounted on the walls for things like live football, and one was mounted on a pillar.

One evening, some celebrity was on the TV wearing a really bad wig. My mother pointed and laughed, then said ‘Look at the state on that wig, it’s bloody awful’.

As she said it, one of the customers stepped around from behind the pillar, wearing his rather obvious wig…