Expelling the mist out of your nose is what activates the Olfactory Nodes in your nose. Your Olfactory Nodes are directly connected to the Limbic System in the brain and are associated with the release of neurotransmitters to affect mood. Although your taste buds can play a similar role in their connection to the Limbic System, it is the Olfactory System that plays a larger role in triggering the reaction from the Limbic System.
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