What is up with guys who pre-flush the urinal?

For the benefit of all women and men who have yet to witness this neurosis, I am referring to folks who walk up to a urinal, flush it, urinate in it, then flush it again. I have also witnessed some more severely afflicted with this issue flush at regular intervals during urination; this is usually observed in men more advanced in age, for whom this biological necessity has become a more protracted process.

What is wrong with these people? Why do they flush before starting? What a waste of water! Are they too good to pee into water perhaps already used by someone? Can they only go when there’s a pristine bowl of water before them?

During visits to bathroom stalls, where one is often detained for long enough periods of time to have multiple urinal visitors enter, I have even heard them come in and pre-flush right behind someone who just flushed. So what is the rationale there? Is there a fear that the water is stale, or that someone with clear pee has laid a trap to trick them into peeing into a urinal bowl that already has urine in it?

It’s weird and unnecessary. Hear me, pre-flushers; stop this madness!