Salt (call it sodium if you want to sound smart!)

A few days ago, my science teacher asked a simple question: Whenever you eat out a lot on vacation, do your fingers ever start to swell because of all the salt they put on their food? My response: But wait, dont you eat food with a fork? I was flabbergasted, because everyone started to laugh, including my teacher! Fighting over another laugh, my teacher says: After you DIGEST the food, then it goes to your fingers! She kindly told me later that she had shared my comment with other teachers at lunch. How embarrasing! Now you know: Never trust you're science teacher! (and never answer a question if you dont know what it means!)