A study by the Boston University School of Medicine has revealed that smoking can cause penis shrinkage.
The study involved 200 men with results showing smokers had shorter erect penises (up to 1cm shorter) when compared to the length of non smokers.
In the same way that smoking damages blood vessels in the heart, studies have shown the same happens in the penis. As blood vessels are damaged, blood flow is restricted which in turn affects the ability to stretch during an erection.
