A number of men find themselves worrying over testicle size, fearing that how big (or how small) they are may affect their virility and sexual performance. The good news is that there is no truth to the rumor that having smaller testicles compromises a man’s ability to give and enjoy good sex, or to father children.
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http://ezinearticles.com/?Should-You-Be-Concerned-About-Testicle-Size?&id=138689