I might as well do two posts in a row from xkcd. (Actually I ran on this from someone on Twitter and thought, “I have to post this thing.” It only just occurred to me that my last post was from them.) Upon this, all I can say is, they rock!
Most guys are familiar with the International Choice of Urinal Protocol. xkcd shows, in an amazing and funny post, that it’s actually really complicated when we guys use urinals. Of course, there’s math involved.