[He can't spare a giggle or two for that. This is just too rich.] I do recall that you seemed to think it was ridiculous once or twice. Why, I can't say. [Especially when the boy is willingly humoring him this time, and even initiated it.]

Tell me, then. What sort of whim is it that has you jesting with me on this miserable day?

[He'll be all too happy to continue, but inquiring minds must ask.]