I used to pretend smoke. For me it was the hand to mouth motion. If I closed my eyes I could imagine actual smoke coming out. Good luck!
this is one of the reasons vaping works, it allows you to slowly withdraw from it while still offering that hand to mouth action you are craving. 9 times out of 10, that was usually what drove me back to cigarettes. Getting over the nicotine isn’t too hard, it’s replacing an action you have repeated millions of times over the course of years.