Object: a glass that is clean on the outside, but obviously dirty on the inside.

Good morning, boys and girls. Have any of you ever helped your mommy or daddy wash dishes? This morning I brought a drinking glass that I washed myself. Isn't this all nice and shiny and clean? Actually, it's nice and shiny and clean on the outside, but it's still all dirty and yucky on the inside. I didn't feel like washing the inside of the glass, just the outside. Would you drink from a glass like this? I sure hope not. If you …