Changing Tastes

Overheard in the backseat:

{ongoing conversation between 6 1/2-year old son and 8-year old daughter about sandwich types}

Son: I don't like cheese.

Daughter: Why not? You used to like cheese.

Son: My tastes changed.

Daughter: But you used to LOVE cheese.

Son: Yeah, well, I USED to want to be a ballerina too.

Duaghter: Oh yeah, I remember that.

{silence}