That seems like a sure sign you're low on protein, or iron, or something.

I remember a couple of years ago when I was just getting over an awful ear infection, I craved meat like crazy and ate it about three days in a row, when normally I eat meat MAYBE once a year. People think I'm a vegetarian even though I never claim that (and I actually eat fish fairly often). But when my body was desperate to rebuild itself... red meat it demanded.