You're correct to be aware of bathroom issues but it's not a serious consideration for having the surgery. Consider yourself more lactose intolerant among a few other things and just eat around certain foods. The heavy consumption of fruit is important for me for hydration and feeling satisfied with food. The only gas triggers are grapes (red & green). I still eat them at home but not if I'm going to be in an office or public area like the gym. No issue eating berries, oranges, pinneapple, peaches, mango, grapefruit and most others. I'm not kidding about eating at least 20lbs a week of fruit, often way more. It's great for supplementing hydration and satisfies a sweet craving.