I can't fathom why you'd continue eating McDonald's after multiple bowel surgeries... But I can't fathom why you'd eat McDonald's in the first place, so I guess I'm biased. I'm certainly not one to bad mouth fast food; I eat more than my fair share. But McDonald's is pretty low on the list. Burgerville is the shit up here in the Northwest; fresh made when you order. Costs twice as much as Mickey D's, but it's worth it for food that's palatable; their bacon cheeseburger is made with real bacon, not those weird generic "meat strips."
Still, if you've already had two surgeries to repair your devastated bunghole, perhaps eating burgers every day isn't the best plan.