It's a rubbadubdub-in-the-tub series. I don't kno where that expression comes from but it stuck by me even when it's not official english. Don't know why I did the series, but I stopped asking myself that kind of question. I just thought it was a nice idea, the scarecrow agreed and then it went side ways with something else spooky. Isn't Halloween a great excuse? I think I did a bathtub scene last year too. Probably because of the utter vulnerability of someone in a bath tub. Adds to the suggested drama.
And in this case it's funny at times too. My personal opinion, of course.