I’ve never really thought of food/drink having complimentary flavors… Though, back in the days when I was a heavy soda drinker, I would have most likely drank Dr. Pepper or Mountain Dew with pizza.
Dipping pizza crust in soda sounds weird to my ears… if I were to dip pizza crust, I’d rather do it into something like marinara, buffalo sauce, cheese sauce, or honey mustard… dunking cookies in water also sounds cringe, but now I kind of want to crumble up some cookies in a bowl and pour milk over them and eat them like cereal and have to wonder why the thought never crossed my mind… Did once pour orange juice over fruit loops or fruit rings without realizing it(I think it was early after I went blind, I was the only one awake in the house, and I hadn’t yet developed the habit of smelling what’s in a milk jug before pouring), not as bad as you might think…
Though, something a bit odd I do regarding pizza: when I splurge for the cheap, microwavable pizzas I like, I like to fold them in half and eat them like a sandwich or soft taco.