This is Pareto (the 80/20 guy! Click here if you don't know who he is). His theories even work with facial hair it seems. Pareto's facial fuzz is around 20% moustache and 80% beard I reckon. Hope you're still enjoying Movember and all the hairy goodwill it brings. If you're growing a 'tache of your own then maybe 20% of that hair is causing 80% of your itchiness? If so scratch away and know that you are at least 80% good for taking the time to grow that top lip fur! Enjoy!