I have bought these

black shoes

and these

red shoes

and these

blue shoes

As astute eyes like yours will have noticed, they are all the same. I bought the black ones first, and they were SO comfortable and SO pretty that I found myself thinking about the other colours and wondering whether they’d be a good investment. And after a couple of days I remembered something that an ex-boss at the Guardian once told me when I couldn’t decide whether to buy a lambswool Elvis Presley scarf for £45, which was that the amount of emotional energy I was expending worrying about whether to buy it would soon outweigh the financial cost of just doing it. So I did.