Bouncing ball - Wikipedia
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I recently shocked a woman by explaining that balls move based on the temperature. What else do people not realize about male anatomy? - Quora
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His balls will very slowly move up and down and around like the giant lumps in a lava lamp. : r/BrandNewSentence
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Balls and Cum an Illustrated Guide - expert sex education - BISH
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I can retract and lower my testicles voluntarily, is this normal? - Quora
