A trip to the doctor

We were at the doctor's office with Matt, and Caleb was up to minor mischief as usual. He took off his shoes. Matt, concerned that Caleb was walking barefoot on the germ-infested floor, demanded that Caleb put his shoes back on. Caleb tarried of course. Matt, becoming more frustrated, said, "If you don't put your shoes on right now, I'm gonna throw up on your feet." (Part of Matt's illness includes vomiting) So, Caleb put his shoes back on and began exploring the exam room. He was intrigued by an anatomical poster that showed a skeleton with labels of his various parts. Caleb said, "That guy no has shoes on. Daddy, I hope you don't throw up on him."