No: Donating blood will have nothing to do with the size of your penis. Neither will smoking. Smoking will, however, cause a number of other chronic health problems down the road if you continue to smoke. Among the possible problems are: cancer (almost all kinds), heart attack, stroke, emphysema, bronchitis, gastroesophageal reflux, hypertension, congestive heart failure, and erectile dysfunction.
Answered 8/28/2015
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