In the performing arts you have to have thick, thick, thick skin, because of all the rejection you face on a daily basis, and the fact that work never lasts for very long. But you need thin, thin, thin skin in order to access all of your emotions and your creativity so that you can express it. You can't be dead inside. Otherwise you've got nothing to give. So it's a paradox, that we have to exist in both planes in order to do what we do.
I think for a lot of people that are in performing arts, it's easy to fall into the trap of starting to confuse what's real life and what's not, because to your body it's all real.
I think it comes down to the type of personality that the performing arts seem to attract. And that's outgoing, very sensitive - sometimes incredibly insecure - people, that for some reason need a lot of validation. They have a lot that they have to get out, and they choose one of the hardest professions in the world in which to exist, being as sensitive as you need to be.