This morning as I was going in for a shower at my health club, I decided to use not my current favourite cubicle but the one which used to be my favourite until about six months ago, when I got bored with it.

Why am I telling you this? Because it has to do with the way nostalgia infects even the tiniest minutiae of our daily lives. You see, the reason I went back to my old shower cubicle is that I was feeling a bit sad and I hoped, by revisiting it,