So we all resort to the easiest thing- modifying our faces as per people around us. If they are staring at your mouth after a meal you know you need to clean yourself.And so on.
Again, people around influence how you think you are. Surrounded by beautiful people you think you are too.Because, afterall, you cant really remember how flat your nose is after seeing every variety of acquiline and cute small and so on.You will start thinking your nose is another sweet variety of small. Which of course will be proven wrong the moment you face a mirror.
Is that what Johari meant in his famous Window?