Contact Admin. All the combinations you mention in your question are dangerous. Cigarette smoke has been known to have hundreds of carcinogens a substance capable of causing cancer. Now, these carcinogens work very indiscriminately. They do not care, not one bit, what type of healthy living cells they come in contact with. If you inhale smoke and carcinogens reach lungs, it's party time in the lungs.
Also, is getting cancer by puffing cigarettes more harmful than by smoking pipe without inhaling of course? Neither is harmful, despite some of the scare comments. The first rule of toxicology and carcinogenicity is that "the dose makes the poison. That tried and true principle is why the EPA allows a fair amount of arsenic in the drinking water supply --and there's arsenic in virtually all water.
Coffee contains 19 known carcinogens, peanut butter is full of them, and alcohol has been labeled a Group One human carcinogen--and even their aromas contain carcinogenic molecules. Getting dental x-rays and flying in an airplane expose you to carcinogenic radiation. And inhaling almost any biproduct of combustion —like enjoying a campfire—is, at least technically, carcinogenic.
And here read it all is an incomplete list of carcinogenic foods--most of which are actually considered "healthy. Natural carcinogens in your Thanksgiving dinner will give you cancer! So since humans have managed to survive cancer-free and have continued breathing after decades of eating, drinking, flying, x-raying, breathing in car-fumed city air, sitting at tables with burning candles, lying by firesides--in short, living in the natural and naturally carcinogenic world--it's doubtful that two cigarettes a week are about to harm you, whether "puffed" or inhaled.
However, if your fear impedes your enjoyment, then why do it? Firstly, puffing and inhaling are the same thing. When you bring smoke or vapor into your mouth, your mucous membranes and epithelial cells that line the mouth, will absorb some of the drug and poisonous byproducts of combustion or just the drug nicotine when referring to vaping.
