I love to climb trees. It’s like rock climbing—it stretches me out and wakes up my body. It’s fun. Something about the act of climbing a tree brings me, instantly, back to the mindset of joy, of being a boy.

From BBC (well worth reading):

“Trees are generally in the background and we take them for granted,” he says.

“But when people climb them, all of a sudden they are aware of all the particles that make up the tree.

“Rather than it just being ‘that green thing over there’, they see the texture of the bark, branches going out and all the things that go into making it.”

American Apparel likes tree climbing, too. Though I think what they’re selling may be bare butts: