Oy! I take mild and pretend offense to that, I most decisively can aim! I can target individual spots, create letters, pinpoint individual insects, and specific rocks/plants when in need.
But, in fairness, sometimes things aren't so clearly defined. Splitstream (where the urine divulges in two different directions) can occur if the male doesn't urinate after ejaculation, whereupon some seminal fluid can remain in the penis, momentarily interfering with fluid flow. If it's been pushed to the side a bit while we were seated for awhile, we may not be aware which exact cardinal direction the head is facing, and so might have to alter the angle immediately after initiation. Maybe it has a bit of a natural bend to it, and that has to be compensated for, causing a bit of off-shoot. Men with foreskins probably have a set of additional worries. And then there's the matter of pressure, which is a whole lecture on thermodynamic systems that I wouldn't even begin to get into. And gods help you if there's something more interesting than our meat (Though, this is hard to do) on the wall that we want to stare at and read.
Though, there is the occasional "how far back can I stand, arcing my high pressured piss into the bowl" challenge, followed by the immediate run back to the bowl to deposit the last few drops.
