One of the most famous tricks of all: Although doing smoking tricks is by no means the healthiest party stunt you can pull, there's no denying that it's impressive. There's something very aesthetically pleasing about the way smoke moves, and being able to manipulate it with your mouth is a skill to master. Here's how. Blow O's or smoke rings. To do this (and most smoking tricks) you should not take the smoke into your lungs but into your mouth instead. The reason for this is because you will need to retain the smoke much longer than if you were simply inhaling. Holding smoke in your lungs for these tricks will make you cough, and that doesn't look very cool. Use the muscles in your cheeks to suck in a full mouth of smoke, then form a tight "O" shape with your lips, making sure that your cheeks are stretched taut. Make quick, precise movements with your mouth to contract it slightly, and do this several time in succession. A stream of smoke rings should follow one after another. Create another trick--blowing one smoke ring through another. Contract your mouth muscles to push rings out until you figure out how to make some O's large, some small, some fast and some slow. This will probably take a good deal of experimentation before you get it down. Position your head so that you're aiming at a downward angle. Blow a medium-sized, slower moving "O." It will drift upward and expand slightly as it floats up. Right before it reaches about the same level as your mouth, blow a smaller, faster moving "O." Keep practicing with the size and speed of your O's until it looks right.
It is a sexual fetish based on the sight or image of a person smoking. The smoker is commonly female, since most smoking fetishists are heterosexual males. For many of them, the fetish appears to have had its roots in early childhood. Some smoking fetishists merely observe, while others become personally involved with smokers. Several online vendors cater to the fetish with videos and photos, which often also show explicit sexual acts. Smoking fetishes tend to single themselve out into very specific categories, with most fetishists enjoying only few, specific categories, often finding others unattractive.(wikipedia.org)