Heh, yeah it's kinda silly.
I use a Mach 3. Really I'm just bad at explaining this, you know how even after a close, good shave you may not be able to feel any hair, but you can see it (the bottom of the folicle where it was cut off).
My problem is that on me that only appears on my upper lip.
Really, it's most liekly one of those little quirks one notices only on himself.