wear them all...but make sure you don't look ridiculous. when i graduated (and trust me, if it weren't for my parents I wouldn't have gone), there were quite a few people who clearly just wanted to "prove" something and lavished themselves with everything they could.
think of this: the pictures you take on that day will last forever, so what is worth more? looking good or "proving yourself" to other people who you'll probably never see again?
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