No.... wearing bras don't cause breasts to grow.... more like wishful thinking... actually wearing a bra may retard growth by keeping them in compression..... Gyno is caused by a number of factors...
Actually it depends on the type and how you wear it. Karren is right about too much compression so choose the appropriate bra. Please read my thread on Fat Brushing and Binding here: http://www.breastnexus.com/showthread.php?tid=17599
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