The Reasons
Lack of public toilets
Mother Nature
Male quest for dominance
Veiled exhibitionism?
Fast-paced life
Societal tolerance
Bladder Rule To pee or not to pee? News Take Pledge
  It couldn't be veiled exhibitionism could it?
 

Is this veiled exhibitionism? True exhibitionists will perform it in the grand old Oblation-style. Yet, in this indecent act, there is anachronistically a certain element of decency. Nobody among the many practitioners of this public act perform it with a conscious effort to show off one's anatomy.

Majority would shield themselves from public view by carefully seeking an unlit corner, a wheel of a parked truck or a Meralco post (anymore sinister motive here?). Evidently, there is a conscious but tacit realization that this is an embarrassing act.

In fact, 64% of the respondents to our survey said they were rather discreet about the whole affair, although one suspects they are just fooling themselves. since 80% admitted to doing it right there on the road. Some even claimed to do it public view. A disturbing 18% confessed to enjoying the act immensely with 21% vociferously admitting to wanting to do it again.

If it's not veiled exhibitionism, it might just have something to do with Freud's comparison of urinating with sexual gratification.