No offense intended to anyone, but since I was a tike and got my first pocket knife I've been told that paper or cardboard will dull a knife faster than anything other than intentionally grinding the edge on a stone. That may have been adults that wanted to reign in an overly "sharp-interested" child, or more likely it was close to the truth.

Cold Steel does that and sisal rope to prove how sharp their blades are, BUT, they have 1000s of them to play around on.

I say, if you have a razor with a paper thin edge (like most do), don't cut anything with it except your beard. Having said that, you can do whatever tests you want with your razors, just don't encourage others to do the same.