If it's any consolation the bible of all things cycling 'The Art & Pastime of Cycling' by R J Mecready published in Dublin 1891 doesn't mention the danger of 'sexual dysfuntion' from extended cycling. It was more concerned with warning cyclists of the dangers of wearing cotton rather than wool, mouth breathing rather than nose breathing and the inadvisability of drinking water while riding.
Studies weren't quoted in support of these theories but a heavy reliance was placed on the opinions of clegymen cyclists.
Despite this unscentific approach large families continued to be normal for several generations.