Or, since blades are cheap and I like them sharp, I just use the two and out rule. If your razor has not blade in it, put a fresh one in and use it, set the razor aside when you are done. If your razor has a blade in it already, this means you are shaving for the second time on that blade, simply discard it after the shave. And so on.
Razors don't shave people. People shave people!
There are three critical types of moments in life: Times when we should be enamoured of the finer details, and times we should ignore the minutia.