To the folks that are saying that they don't understand how someone can enjoy it, it's really easy to enjoy it. It's really not for everyone, but lots of people enjoy doing.
At the end of the day, when my two toddler boys are in bed, a cigarette is very enjoyable. It helps with my stress and is very calming.
I could say, I don't see how someone can enjoy eating fast food, because after I eat fast food, I feel gross.
I am in complete understanding of how unhealthy smoking is, and I will quit eventually. But it's something I enjoy doing, just like some people like eating ice cream or drinking alcohol. It may be unhealthy, but it's a choice. It's not yours, and it's really intolerant to say that you are repulsed by someone because of it.