Indeed. Certainly, at the subatomic level, if one simply observes the act of pushing the razor and does not observe the act of pulling the razor then the electrons in both the strop and the razor behave differently on the push and pull. Quantum Theory speculates that by the very act of watching, the observer affects the observed reality. But why bring quantum theory into stropping a razor... seems a little over complicated...
Adam
Is it really reality or are the electrons that are bound in the outer layers still in a state of wobble, thus effecting the change in stroke creating a leather magnetic interference that you are perceiving in the feel and sound. Particulate matter discompensation.