Can smoking effect erection and hardness of an erection?

Yes, smoking does effect the ability to get an erection. Smoking (nicotine) causes blood vessels and in the body to constrict. This reduces blood flow to extremities like fingers and toes and yes, no matter what size you are, your body considers your penis an extremity. So unllike Viagra and the like which open up the bloos vessels to make you a happy camper, smoking closes them down. Heavy smokers have more of a problem and the older the smoker the lesser the ride. Combine this with other maladies such as high blood pressure, anxiety, depression, prostate problems and any other number of problems and well...let's just say you're gonna be headin' down the runway but you won't be taking off.