As you age and laugh, cry and enjoy life altogether your face is going to preserve each of your precious moments in the form of a wrinkle. They say wrinkles are a trademark of happy people, but even, so, you want to get rid of them.
Why does it not say that on the package?! "Make sure the grooved side of the bobby pin is facing down, against the skin. The ribbing is designed to grip hair and lock it in place, and you will capture more hair with the pin in that position"