more grapefruit

Last night, after eating a very filling chinese dinner, I ate a grapefruit. It was so good I went crazy. I couldn't even relinquish a piece to my Studly Hubby. I was handing him the piece, and somehow as I was transporting it from the plate to his hand it ended up in my mouth and I ate it. We had to get out a second grapefruit and I ate most of that too. Why would a person crave grapefruit so ferociously??