I sing at the moon in my head and I mean it, there are feelings that might equal it at their time, but at the moment when you and the full moon are staring at each other then there is nothing that beats it shining on you.
Except sitting under a tree in a wood quietly absorbing yourself into the forest.
And making love (which is obviously not considered to be mad by others)
But talking to trees and the place that you are in in general, probably is (when its a real place that is)
Talking to the sky, and the sea, and water in rivers/streams.