It's too easy to feel humiliated compared with big tits, the fun comes when you feel humiliated compared with someone like her (and I bet you envy her):
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I suggest you to quit buying bras, they are of no use. Save your money to buy a couple of plugers like this
well, they wont make you raise a sort of tits, but will make you look as if you had some bumps on your chest for a minute or two after half an hour of application. It's better than nothing.