THE B: "Daddy, I've thought of something for you to do the next time we're at nursery."
ME (with plenty to do already): "And what might that be?"
Short pause as The B composes himself.
THE B: "I thought you could go out and buy us a fish."
Silence, for just a moment.
THE B (by way of explanation): "For our tea."
ME (a touch on the sceptical side): "And what kind of fish did you have in mind?"
There followed a brief period of contemplation.
THE B: "Just a normal one . . . ."