I was putting fresh sheets on Little Brother's bed, and he was getting dressed. As I took off the old sheets, I found a crumpled tissue under the pillow. So I teased him a little, "Ewwwww! Who left a yucky tissue in the bed?"
He gave me that look that I can't believe he has cultivated at the age of 4 1/2, that look that says, "Mom, are you really that clueless?" and said, "Mom, I was SNOTTY last night."