Its not only a pinoy habit,seen it in places as diverse as Peru and China,I did a train journey once through India,every morning I saw heads in the fields of crops the train would pass through,lots of heads without fail first thing in the morning I took a walk through some crops bordering a village once,splashes of diahorrea (no one has solid stools in India)everywhere told me what the owners of the "Heads" were doing,its third world guys,I even saw a woman in a sari once squat and urinate Its not shocking,its human nature,if we didnt have a decent infrastructure and were brought up in somewhere like pinas would we know any different?