well... I think its true that some people don't get high their first time. I have a friend from israel and he smokes ciggarrettes and hookah all the time. He knows how to inhale... we smoked with him 4 times and he never got high until one night he starting bursting out laughing for nothing. I think there has got to be some science behind it because we smoked the same shit out of the same way every single time.