Experts say that smoking can be really bad for the male form. Urologists claim that smoking could cause erectile dysfunction and shrinkage. It comes down to blood flow. Smokers have higher instances of atherosclerosis in blood vessels. That reduces blood flow in all parts of the body, including the penis. Smoking can also lead to the penis getting shorter over time because of the same lack of blood flow levels. Will this information deter you from smoking? Are you a smoker and you noticed a difference "down there?"