i never go number 2 in public, i'd rather break into someone house with a ski mask and take a dump and take my chance at getting arrested for home invasion or shot then use a public restroom.
urinals...man, i piss on the handles and create a golden water fall. i don't ever flush a urinal, 2 guesses why.
piscine, it's like my body knows i'm too far away from the base and the digestive tract kicks into slo mo. i literally don't get the urge, even when i'm away from home all day for multiple days. Chances are when i'm gone for more then 3 days, i'm staying someplace where i still dont' have to use a public restroom. even if i'm camping for a week straight, i'm goin bear style!