Since when did trees, books, snakes, animals and stones become humans beings? We are discussing human relationships here.
Anyway, since you insist on diverging - People who love nature, love trees, plants flowers etc. People who have pets, love their pets like they would a child or a best friend. People who enjoy reading, love and cherish their books. People construct idols out of stone all the time and love them with reverence and respect that they don't even give other humans. I guess everyone of us is mad in some way or another.