I asked Spark to bring some towels down to the basement bathroom, he was hesitant at first, claiming that he didn't think there was room on the shelf. I assured him there was. He returned from downstairs after a while and announced it was taken care of.
I went down for a shower later in the day and saw his sign:
"SHOWER USE ONLY!"
This bathroom only has a shower and a toilet in it. What other uses is the nine year old boy mind contemplating? I shudder to think. I had to ask and was told "like if the toilet is overflowing or the water heater explodes or something. There is a mop in the laundry room ya know". Whew. Glad we cleared that up.