Grapefruit on a Grapefruit Diet

A grapefruit decides to go on a grapefruit diet. The diet works because the grapefruit knows how bitter grapefruits are, and it doesn't want to touch them.

So the grapefruit loses weight and becomes a flat grapefruit.

The grapefruits that were meant to be eaten also lose weight and become flat grapefruits, because no one is eating them. They feel a little sad but are mostly unaffected.