I am 83 years old now and have been shaving for most of them I have tried about all the major products and I have found that I really like the vibrating disposable head razors ( Fusion Pro Glide and Schick Hydro 5). I have a question that I posted at a different site and no one could answer. How do vibrators actually improve a shave? Or do they?. I have seen many theories but no one has come up with the actual reason that Gillette and Schick came up with these models. I know, I know, MONEY. But is there any actual evidence that they work and it is not all in the head of the user?