For me, it’s because I’m lazy. Because I just want to pick the same thing every day, every night. I don’t want to make decisions about it. I’m going to throw something on and run.

That’s the straight answer. The other reason we wear black is because it’s simple and everything else should be the color – your ideas should be the color. So clothes don’t get in the way of the work. It’s more about neutrality. Black clothes mean not making a ‘statement’ but rather letting your work speak for itself. And it sophisticated.

Is it also because it’s slimming? Should designers look slim as a matter of course?

I think that helps. I think you need to look svelte.

Does looking svelte make any idea 10% better? How much percent better is an idea if you are svelte?

Fifteen percent better.