I was finding it hard work entertaining our dinner guests when TPR kept disappearing from the table for long periods of time. He would have enjoyed the company of my school friend MG, if only they had been there simultaneously.

Towards the end of the meal, when I asked TPR what was going on (and whether he was avoiding MG), he confessed that MG had not been with us. Rather, TPR had been conducting an experiment: whenever we thought MG was at the table, it was actually TPR in disguise. I had to admit that my husband’s act had been very convincing.