See all those bumps [on your tongue]? Those are called papillae (say: puh-pih-lee), and most of them contain taste buds. Taste buds have very sensitive microscopic hairs called microvilli (say: mye-kro-vih-lye). Those tiny hairs send messages to the brain about how something tastes, so you know if it’s sweet, sour, bitter, or salty. The average person has about 10,000 taste buds and they’re replaced every 2 weeks or so.
from http://kidshealth.org/kid/talk/qa/taste_buds.html
What this means is that every two weeks, when you try a new food, it will taste different…AND YOU MAY LIKE SOMETHING NEW!!