I met a sculptor on Twitter who told me that before unveiling her latest work she had to chop a piece off her statue because it offended a surviving relative of the subject. The ceremony would not have gone ahead if the appendage had stayed on.

The artistic process is not sacred. If people can butt in, they will. Sometimes two hands are better than one. Artists often collaborate. We see it in the case of the master and apprentice. Occasionally the apprentice becomes more celebrated than the master. What happens to that pseudo-parental, curatorial relationship then? And when one dies, what sort of eulogy does the other give? What if the apprentice were the first to go?