Why do women prefer hiding their Nipples

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I notice and ofcourse that is the way it is, that women like to hide their nipples, while revealing the other part of their breast.Even on television, they dont care if the the other part of their breast is shown, as long as the nipples are blurred. CAn any one tell me why? Whats so special or shameful about the nipples? I will prefer an answer from the ladies in the house....(first-hand experience you know lol...)