Heres some tips for you from experience..
BBW lovers although of course they love to look at boobs, ass and pussy there are some that love looking at womens curves, belly overhang, love handles and some even as far as stretch marks and cellulite depending on how big they like their women.
As MrMaryLou said, never ever ever use food in tours, its degrading to the women which in turn is degrading to the men who love them. Not every fat chick eats crap
Your top line "Big girls suck better cock because they are always hungry" is funny. Do skinny chicks eat cock to put on weight? lol. Again its not really appealing to the lovers out there.
If you'd like any more advice, hit me up. We run 2 bbw sites at present (one is my own paysite).