TASTE BUDS! My mother always said "your taste buds will change!" This was her way of getting us to eat things occassionally that we did not usually care for, and to see if they had changed as we were promised. Actually they do change over time and so it is a good idea to try something that you did not like before!
We have about 10,000 buds in our mouth and another little fact is that usually girls have more tastbuds than boys. (but we already knew girls have more taste).
Here is a colorful page with the map of the mouth on it and all kinds of little FYI's.