SH: Where's the other flowered pillowcase?
Me: We don't have one.
SH: Yes we do.
Me: No, we don't. These sheets are missing a pillowcase. I've been using the white pillowcase since I changed from the flannel sheets.*
Me: Yes I have, but I've been giving you the flowered one so you won't complain. You only noticed now because I finally gave you the white one.
SH: We have another flowered one.
Me: Fine. You look for it. I don't care that much.
* Over a month ago when I mistakenly thought "summer" had arrived.