3 questions

[Asca]

So there have been a few things that I've been trying to understand.

1st. I continuously read about only watering from below, don't let the leaves get wet, etc.. Now I understand the reasoning behind not letting the crown collect water that just sits, in the wild the plant is situated so that the water cannot sit in the crown. However I'm very sure that it rains and that the plants get completely soaked with water in the wild. So why the disconnect, which is it? I wouldn't think water would damage the leaves, but....

Two I keep reading about how orchids like to be pot bound. However, again in the wild orchids don't live in pots and are free to grow every which way same too on mounts. What is the reasoning behind the orchid being pot bound?

3rd I've been looking for a good book on orchids, something dealing with biology, growth cycles, root structure, etc. Don't mind dry science books.