No, you inhale all of it. If you don’t inhale, the desired substance won’t be absorbed into your body. You light a cigarette once and it stays lit. A hookah, if loaded properly, should remain “cherried”. A marijuana pipe must be continuously lit each time you take a hit, unless it happens to become “cherried”. Hookah smoking material is designed to stay “cherried”, marijuana is just something that grows naturally. Marijuana pipes will also often have something called a “carb”, which is a small hole on the side of the bowl, underneath the chamber where the marijuana is loaded. You plug the hole with your thumb while lighting the bowl, as the pipe fills with smoke, and release the hole once the pipe has filled with what’s taken to be enough smoke for a suitable hit. When the carb’s open the smoke flows a lot faster, you see. Marijuana is also often smoked from water pipes called bubblers and bongs, which I can explain to you if you’d like.

Hookahs More Popular Among Teens Than Cigarettes http://www.cigarettespub.com/info/smoking-hookahs-cool-for-teenagers

You’ve got your facts a little mixed up.

Marijuana, in any form – joint, blunt, bowl, or bong- is usually inhaled.
Tobacco is really only inhaled in cigarette form. Cigars, pipes, and hookahs are smoked (just keeping the smoke in your mouth).