Mayb eI am inhaling everytime I draw from the hose, but my perception is the same as Hajo's. I smoked cigars for years prior to hookah, I feel like I have to make an effort to draw the smoke into the lungs to inhale. I can tell when I do it because there is significantly less smoke on the exhale. Duuno, maybe its just me.
The greatest obstacle to discovery isn't ignorance, but the illusion of knowledge