So there's absolutely zero chance that OP is suffering weekly nicotine withdrawal from
I light 2-3 cigs on the weekends and that's it
?
I guess I was transported to an alternate universe where nicotine isn't addictive at all to anyone, then. Bye.
Some are more susceptible to nicotine's addictive nature than others. In particular, the adolescent brain is more sensitive to the effects of nicotine and therefore more susceptible to its addictive properties. I don't think you will find a definitive answer on how many cigarettes you have to smoke to become addicted to nicotine.