Sitting Under Trees

I don't understand why people love to sit under trees.


Picture an open field. In the middle of that field is a nice tree.
Where do you want to sit in this field? Probably under the tree.
Now picture yourself walking your dog in this field. Your dog has to pee.
Where is he going to pee? He's aiming right for that tree.
We know this is how dogs are. Why do we always insist on sitting where dogs pee?