I started smoking and didn’t quit until I was 64 years old. I started to develop some of those symptoms that are associated with smoking and I had been a pack a day smoker for a very long time. I finally recognized a warning when I saw it, so I quit cold turkey. For about a month there was no problem, but after a month I started to have very intense cravings. Now I knew enough to know that the nicotine had left my body after about three days, and the chemistry for a craving is usually not present after a week or week and a half. I tell people that Just because you know you’re crazy doesn’t mean you’re not crazy so while these cravings had to be habit/psychology based, they were just as real to me as anything I’ve ever felt. I started using e-cigarettes to fool myself. I worked. I haven’t had a real cigarette in over four years now. The hardware and liquids have vastly improved since I started from the little ones that looked like a king size cigarette on steroids to drippers with mech mods to regulated mods and sub-ohm tanks. I got back most of my sense of smell, and better lung capacity and e-cigarettes keep me from missing the habit I burned into myself for decades.