Actually, no, you're wrong, that's not true in most respects. Orange juice is an acid, well citric acid is an acid, and flouride is a base, and when acids and bases get together, like for a party (I learned this in honors chemistry a couple a months ago), they don't get along and they cancel each other out. It's like a science fair volcano, but in your mouth. Hope this helps. Glad you cleared that up for me.