When I was in New York in March I saw a novelty booklet entitled 'What your poo means' (or words to that effect). I couldn't resist and I bought a copy back as a present for C. I wasn't sure how C would react to this present but he seemed to take in good spirit. I noticed he spent a long time reading it afterwards.
Later I wondered if I had been too sensitive to this practice of C's. But I believe I have been vindicated. C recently returned from a long weekend away with his niece. He told me that half way through the weekend she turned to him and said 'Uncle C I don't mind you checking out your poo but please don't tell me about it all the time'.