It's amazing what a little denial can do for a person. Why think what you think, feel what you feel, or know what you know, when you can avoid it completely, squash it down and out and simplify your life immensely. One must be thorough with the squashing, however, lest it come bubbling back up, but still, it's really quite handy. So clean and comfortable. Of course it's possible to become rather empty and disconnected this way, and at worst it could trigger some sort of psychotic break from reality, but I'm sure that's just in the really extreme cases, like with serial killers and such. The rest of us are fine, I've no doubt.