Gillette Razors
Super Bowl Sunday officially ushered in the age of the 5-blade razor (if you missed the commercial, 
view some fusion flash here).
Seems like just yesterday the Mach3 was all the rage.
Three blades? Man, that's so yesterday.
If you have trouble with that, imagine shaving with an earlier Gillette razor that had but one blade (granted, it had two edges). That artifact resembles a rake more than it does a modern razor.