why use toothpicks?

Yesterday I threw Tonya a baby shower at my house. I was setting up the food table with Emma. I put a meat and cheese tray on the table and then got out my bottle of "party toothpicks". Emma looked at me and said, "Mom, why are you putting toothpicks on the table?" I didn't answer her right away, and after a couple of seconds she continued, "Is it so they can get food out of their teeth? Why don't they just use their fingernail?"