So, what did we do to test the limits of this nice old couple's hospitality? Baths are an important part of the minshuku experience, and they had a nice wooden one. Apparently wooden baths are a big thing, and this was big enough for all three of us. So we all took showers and climbed in the bathtub and relaxed for a while after dinner. Gus was having a good time sticking his face in the water and blowing bubbles, and found it really entertaining when I did the same. When we got out of the bathtub I looked back (to make sure we hadn't forgotten anyone) and discovered that, well, Gus had left them a present. The kind you don't usually leave in the bathtub. So we all took another shower, and I scrubbed Gus really thoroughly. Craig got the job of going out and explaining to this nice old couple that our son had just pooped in their bathtub.
The old man replied "kimochi ii desu ne!" (気持ちいいですね!). This literally means, "it's a good feeling", and we're not sure if he meant to say that Gus must have just felt so happy and relaxed that he couldn't help himself, or if he meant to imply that defecating in the bath just feels really good. We didn't ask.