There is nothing I hate more than cigarette smoke. My parents chain smoked in the house. I hated the smell. Even today, it is the odor I hate the most of all burning substances, including plastic and hair. Smoke was fog-dense in my house. It irritated my eyes, nose, and lungs. Plus, I already had terrible allergies. For all the details, see here.

Nicotine increases the activity of dopaminergic neurons in the midbrain reward system, and decreases the expression of monoamine oxidase in the brain.