I think it just pulls the balls down due to the weight. A cock ring gives you a magnificent diamond hard boner, and helps you to keep it like that, until you empty it, of course.
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Love how he goes in right up to the knackers, the tightening of his arsehole and the jerking of his cock root as he shoots spurt after spurt of his vile seed into her bum. Like the bollock ring.
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