Strange continues to ignore Francis for the sake of having a dumb argument with Rita. She's defending pineapple, this shall not stand.

"Grass and burnt food are edible and yet you don't eat those. It's perfectly reasonable to not want to eat something as it tastes disgusting." His tone is pure 'duh, Rita', this is an obvious fact in Strange's mind. So what if it's all the same when it hits your stomach, you still have to taste it in the first place.