I dated a fat chick once. Well, a lot of times, but this one took the cake, literally. She liked it when I fed her while fucking her in the butt. She claimed to be a "virgin" because she only took it in the ass, ever. Usually a "slip-up" is like when you accidentally-but-intentionally pop it out and go for the back door, but with her I would try slipping it into the front and she'd squirm away from me.
Anyways, yeah, she loved eating while taking it up the chute. Take your girl to mcdonalds on your budgetish and feed her some nuggets while packing her poop. You'll have cool stories later, like me.