Ah, but was it really nothing to do with the opposite sex, feetle? Were peeing contesta not either? Did you know that males pandas wanting to impress an ovulating female will back towards a tree and walk their back feet up it, then pee as high up as they can? when a female passes that tree, she measures who has peed highest. He is clearly the biggest, strongest and most agile of her suitors, so she chooses him.
Bet you didn't stand on your hands to pee up a tree!