He looked at me like I had suddenly sprouted a second head and said, "No! My thumb is pink!"
Me: "You know, your Mom has a green thumb."
He: "No she doesn't! Her thumb is pink, too!"
Me: "Your Mom is really good at gardening and making things grow in her garden. So we say she has a green thumb."
He: Her thumb is pink! Thumbs are pink, not green!"
We all had a good smile. He's a cutie.