Well, for one thing, I legitimately enjoy it. It's not a high or a stress relief, I just like the taste of my menthols, and I like sitting down and smoking, and I like watching my smoke dance off through the air in little curls and twists. It's pretty.
I also always carry a perfume to cover the smell, a toothbrush, and a jacket I wear to smoke to keep some of the stank of my clothes.