I did read that. My thought was that, if your lungs have bitterness receptors and you experience physiological change based on them, then inhaling certain kind

I did read that. My thought was that, if your lungs have bitterness receptors and you experience physiological change based on them, then inhaling certain kinds of air that lack the bitterness may flush out the bitter taste and produce physiological change that corresponds to a lack of bitterness. It's hard to separate out the effects of oxygenation and heat and focusing on the specific point when the air enters your lungs though. So yeah I'm being unscientific.