I don't know if it came from my childhood memory of picking young mangoes over my neighbor's fence. Or climbing on our own siniguelas in the backyard. But eating fruits, especially those that are too sour or just sour with a pinch of rock salt was our way of life. Now, a little salt to sliced apples seems to rock and too good to be rejected as a great snack.
To some it may sound different. But try it. It is good.
APPLE + SALT = GOOD SNACK!