At some point between the time we learn to talk and when we head out into this big scary world on our own, we begin to filter the thoughts that run through our head.
Definitely for the best. Children have no such filter.
Researchers have discovered a very weird phenomenon that turns pretty girls into grotesque monsters. They don't know why it happens but if they line up the eyes and flash the faces of women at high speed, our eyes perceive the faces to be highly deformed. Watch this video and see the effect for yourself!