Allergic to water

While driving to school today we passed a drainage pond that was previously frozen. We celebrated the sign of spring and how nice it was to see open water. Of course, I have to make everything into a science lesson. Sometimes the results are interesting.

Meredith: I love water. Water is great!
Derek: Did you know our bodies are made out of a lot of water?
Meredith: Yeah! [pause] If you were allergic to water, you wouldn't even be a person!