I’d be interested in pressing that a little with people who consider them opposites. Do they think a plain T-shirt and jeans are undignified or formal? What about think fixing yourself a quick cup of tea or coffee?

There will always be people who think differently, but if they view the above as undignified or formal, we probably have very disparate ideas of those concepts that we’d need to agree on before we could actually discuss the dignity of casual sex.