 [ Symptoms ] what disorders affect the penis [ Disease ] harmful yes even one to two cigarettes a day exposes you to cancer causing chemicals and tar they are harmful to your respiratory tract  lungs as well as other body areas if secondary smoke is known to be harmful than certainly first hand smoke is worse why do not you just quit now what is this six month crap the sooner you stop the more likely your body will repair damage and hopefully restore your lungs to the non smoking level that you had previously