For not being all that fond of milkshakes, Tyson ends up drinking a lot of milkshakes. It’s one of the few guarantees in his fridge.
He is sick to death of artificial banana, chocolate, and strawberry, but Tyson has an ingrained compulsion to make sure he’s always getting some form of calcium; from a childhood calcium deficiency that led to weak ankles.
He’s managed to shake the tick now, but one of his OCD twitches was having to tap the top and bottom of a milk cartoon three times before pouring himself any milk for the better part of his teens and twenties.
Another factor is that Tyson knows that milkshakes tend to have a high amount of calories for how easy they are for him to consume. It means that, even on days where Tyson fails to eat more than a slice of toast, he’s not burning more calories than he intakes by drinking them instead.
That is the same reason you won’t find ‘low calorie’ versions of food in Tyson’s home at all.