Cravings

I heard once or I read once that cravings are our body's way of letting us know we need something - a vitamin, more protein, whatever. So what is my body telling me it needs when I constantly crave orange juice, grapes, corn on the cob, chocolate chip ice cream and BLT's?? And I'm not talkin' mild cravings, I'm talkin' that is all I want to eat lately. I drove past a corn field yesterday and became pavlovian. I had four for dinner. I buy a bunch of grapes and they're gone by bed time. I discovered Baskin Robbins is alive and well here in my corner of AZ. And I've tried BLTs at every breakfast and lunch joint in town. I can't get enough. Weird.