Public courtesy?

It's dinner at the local ice creamery. I take Elijah to the bathroom. He goes in the stall and proceeds to get about 20% in the actual bowl. Then he does something I have NEVER seen him do before. He takes some toilet paper and starts to wipe down the toilet seat that he didn't bother to lift up before he christened it. I am stuck. Then this warn feeling comes over me: The lectures about responsibility are finally working! I am proud. With a big smile, I ask Elijah: "Son, you wiped the toilet seat! You do that at home?" He flatly says "no". (smile fades) I am stuck again but this time confusion washes over me. "You mean you clean the public toilet but leave your own toilet a mess??" "Umm, (giggle) yeah." WTF??