Natural olives contain a chemical called oleuropein[0] which has a strong nasty bitter taste that renders them inedible. Soaking olives in a strong brine removes the oleuropein from the olive, turning them into the edible olive people love.
Most people don't know this. It is a common prank to convince people that don't know better to eat the fruit off the tree. As the other poster said, don't do that.
Most people don't know this. It is a common prank to convince people that don't know better to eat the fruit off the tree. As the other poster said, don't do that.
[0] https://en.wikipedia.org/wiki/Oleuropein