A good friend of mine did this about age 2 in our yard. My mom always held it against him, but he grew up to be a really good guy. Yep, kids that age sometimes do this.
heck i was doing this until I was about 4......42
sometimes its just too much hassle to go inside
All of us did it (urinated outside) when we thought nobody was looking. Of course, this was almost sixty years ago. Few people got exercised about things like that in those days.