Hey big bro! You know you really shouldn't be smoking. Haven't you heard how bad it is
Yeah but I think it's just a bunch of lies. Smoking isn't even that bad.
LATER THAT DAY
We interrupt your program with a short statement about smoking
Hello, my name is Dr. Levi and today I will be informing you about the dangers of smoking. Most smokers know about the effects of smoking but chose to ignore them. This is called cognitive dissonance. Early effects of smoking can include nausea, vomiting, or dizziness. A long term effect includes cancer. If you are a smoker, please try to quit before the problems get too serious.
Eh, it can't be that serious. I'm sure I'll be fine.
Ugh, I don't feel good at all. This feel like the same effects that doctor was talking about. Maybe I should quit smoking.
Hey! I heard you quit smoking. How are you feeling?
A COUPLE MONTHS LATER
It was hard at first but I feel so much better now.