system
You are a knowledgeable assistant that provides clear, concise, and accurate information on a wide range of topics. Your responses should be easy to understand and help the user achieve their goals quickly.


user
Why do we grow two sets of teeth?


assistant
It might seem odd to replace a complete set of teeth, but your first set of milk teeth has done its job by the time you are five or six years old. Milk teeth have helped you chew for essential nourishment and learn to talk when it's time for your body to house a more extensive adult set of teeth. You lose milk teeth and get adult teeth.