text: how come when you pee against a wall it spatters on your shoes, but not if you use a urinal? who is the mastermind that invented the wonder of the urinal? ow many of you (women exempted from this little quiz, unless you're truly bizarre) have peed against a vertical object? what happens?  the splatter-demons, of course.  ya pee on your shoes.  but not true with a urinal.  the pee slides right down.  is it the engineering?  is it the marvel of porcelain?  how does it work?  i want to know.  somebody sat in a little room ,thinking--"you know?  everytime i pee against the outhouse wall?  i get splatter.  i think i better do something about that."  and he--i'm assuming it was a he--sorry for the sexist thoughts, ladies--he actually had to test it out, dozens of times, pee all over his shoes.  and what if your trajectory is just a bit long? or a bit *ahem* short?  how then commenceth the splatterage?  but this simply does not happen.  we don't ever hear of somebody coming out of the urinal saying "the splashback was incredible.piss all over my shoes.  nope.  no sign that splatter walrus,  dude, that's hilarious...the fact that you're articulate, spell things correctly and phrased the question just so makes it all the more humorous.  anyhoo...  you did notice that the urinal is constructed in a concave shape, instead of being straight up-and-down...this concave shape aids tremendously in preventing urine from being directed right back at you, the way it would, say, if the stream would hit a standard wall which you speak of.  this in conjuntion with porcelain, which possesses a "slippery" surface to which liquid is directed to slide down the surface of, makes it's design a great answer to prevent making water on one's shoes.  the little "bowl" built into the bottom of said urinal also prevents urine from coating one's footware...the bowl aids in one's aim as well as long or short trajectory, and the splatterage caused by each.  as long as the individual is not too intoxicated, one knows not to stand too close to the backdrop if one knows that his stream is strong...one will get splatterage regardless of design if the stream is adequately strong enough to cause it.  koo koo cha-koo