I Have Been Spanked With A Switch

So if you have been spanked with a switch before or use a switch on your children then how severe are the marks? Is it just some red welts or worse than that? I've heard stories of the switch cutting the skin causing bleeding. How many strokes do you/do your children receive? and do you/do your children have to strip naked for a switching? How far is too far with the use of a switch? I find the wooden spoon much safer.