If you head upstairs after dinner, returning to the kitchen half-hour later, do not expect me to respond with cheerful gratitude when you say, "Are you done the dishes already? I was going to offer to do them!" For, even though I believe you are quite sincere in this, I am not a mind-reader to leave them for you without hearing your intention spoken aloud, and now I am only more annoyed that I did the dishes when I could have been doing something else.

Just sayin'.