So if someone sees you from the other direction, the tree is hiding your dick. level 1 Gotta pee as high as possible too so he thinks you're an absolute unit.
The reason why men piss on trees actually dates all the way back to when man was in the form of an ape and had general animal instincts.
Both male and female dogs mark territory believe it or not. My husband's Chihuahua, when she starts to go looks like a firehose. Her little back.