The Secret Is in the Pineapple Itself
Pineapple isn't an ordinary fruit.
It contains a naturally occurring enzyme called bromelain, a group of enzymes that can break down certain proteins.
Bromelain is one reason pineapple has become associated with tenderizing meat. It can interact with proteins, which is why pineapple juice and fresh pineapple are sometimes used in marinades.
But that same characteristic can affect your mouth.
Have you ever eaten several pieces of fresh pineapple and noticed that your tongue or lips begin to feel slightly irritated?
Maybe there's a faint tingling sensation.
Perhaps your mouth feels almost as though you've eaten something mildly abrasive.
You're not imagining it.
Fresh pineapple contains acids and bromelain, and the combination can contribute to that familiar tingling or irritating sensation for some people.
So where does salt water come into the picture?