just another use of vapor I don't think has been mentioned here. I barely take any vapor into my lungs at all. I do a little here and there, but for me it is more like smoking a cigar where everything is in the mouth and I exhale
thru the nose mostly. I seem to get all the nicotine I need and my lungs are clearing up nicely, which was my goal. When I am seriously craving a real cig, I notice a th and inhaling into the lungs seems to help quite a bit, but I am leaning more towards me taking a deep breath and getting oxygen
Whatever works for you friend, we are all different(I can't eat hot peppers and can't imagine doing it, but someone posted they have them with breakfast and LOVES it lol). One you find your spot, you will know.