Martin writes: In the 1960s and 70s dog poo was white. Why? Dear Martin, When you first wrote this to me I thought you were putting me on.  Every day I take my dogs outside and when they do their business I take a plastic bag and pick it up and their ugly little turds are always brown, so of course I wrote back asking what the eff you were talking about for which you replied something starting with “Ah, perhaps you’re too young”.  Well turds are turds, I thought, they didn’t just invent brown turds when I came along […]