Beth likes English muffins for breakfast. We have plenty. She doesn't eat them anymore.
Beth likes grapefruit, but when I get a good deal and buy lots - she stops eating them.
When we're low on milk, both kids decide they need huge glasses of milk with dinner. I can't argue with that. They're growing kids (at least Cory is) and they need their milk. But, if we have lots of milk, they stop drinking it and I find myself looking for ways to use it so it doesn't go bad and go to waste.