re: Do cock rings really increase girth?
No, cock rings help delay ejaculations and help maintain an erection. Vacuum pumps help increase girth, but be careful as they can put a tremendous strain on the ******* vessels in your cock if used incorrectly. Also, its not a permanent enlargement should you decide to quit using the pump.
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Coincidently, using a pump to maximize your erection, then using a cock ring to maintain that erection is often used by men with PED
(penis erectile dysfunction). Its just distracting to the mood for sex ... sort of like applying foam or a condom just before intercourse.