To say "because it's bad for me" is not a good enough reason because it is too general and you have known the entire time you've been a smoker that it was bad for you
Studies suggest that electronic cigarette-related toxins accumulate in the urine of e-cigarette users, increasing the risk of prolonged exposure to harmful chemicals
As mentioned above, it activates nicotinic acetylcholine receptors (nAChRs), triggering dopamine release in the mesolimbic system, a mechanism similar to other addictive drugs like heroin and cocaine
Suls, The Effects of Caffeine on Ambulatory Blood Pressure, Heart Rate, and Mood in Coffee Drinkers, Journal of Behavioral Medicine, April 1996;19(2):11128
And the last solution, look around during your walk, if you see a group of Koreans smoking in a specific area, then mingle with the crowd to smoke with them