A person that believes everything simply can be planted and grown on trees.
Man #1: Awww damn, I only have one of those awesome fuzzy pink highlighters left!
Man #2: Hey, don't worry! Just plant it, and give it attention, and in about 6 to 8 weeks, there will be an "awesome fuzzy pink highlighter tree" where you can harvest them and use them for all of your needs!
Man #1: Dude, you're such a tree-ist, you can't plant those!