Every time you eat a grapefruit, give your baby some. Eventually, he will eat it and like it. Or he'll go off to college.
Here, Ethan eats grapefruit so fast I could hardly take a picture with any in the tray. It's not the first time he's had it, but the first time he liked it. He liked it so much, in fact, that he managed to sort it out from the boring, bland, nearly-the-same-color-and-texture tomatoes.