The clinical observations have been so compelling that researchers hooked up oxygen monitors to men's penises and had them ride on normal bicycle saddles. Their findings confirmed the suspicions ...

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"Bicycle Riding and Erectile Dysfunction: An Increase inInterest (and Concern)" by Huang et al, "Only the Nose Knows: PenileHemodynamic Study of the Perineum - Saddle Interface in Men withErectile ...