hehehehehe the wiki says that if you smoke can mess whit your penis.
Erectile Dysfunction
Smoking is linked to erectile dysfunction, also known as male impotence. The incidence of this is approximately 85% higher in male smokers compared to non-smokers.
Semen
There is increasing evidence that the harmful products of tobacco smoking kill sperm cells.Therefore, some governments require manufacturers to put warnings on packets. Smoking tobacco increases intake of cadmium, because the tobacco plant absorbs the metal. Cadmium, being chemically similar to zinc, may replace zinc in the DNA polymerase, which plays a critical role in sperm production. Zinc replaced by cadmium in DNA polymerase can be particularly damaging to the testes.
http://en.wikipedia.org/wiki/Health_effects_of_tobacco_smoking
poor Solid Snake