i think this depends on how young or old you are. I almost 56, and have smoked since about 10 yrs of age. when I was younger, my erections were hard as a rock, and my recovery period between erections was a few minutes and most times after cumming, my cock would just stay hard and move on to the second orgasm. and afterwards, i'd smoke a cigarette or a joint or both and be ready to go again. as I got older I noticed my recovery time is longer. and in the last few yrs, sometimes my erection is not real hard. I retired 2 yrs ago, and hardly smoke at all, sometimes as few at 2 cigs a day, on average about 4 cigs a day. being retired is wonderful, that almost a pack a day habit is gone, I feel better, but have not really noticed a big difference in erection quality. I work out daily and ride a bike weather permitting, and have a stationary bike in my bsmnt for the winter months.