The stimuli we receive via our sense of smell not only influence our mental state, making us feel pleasure or discomfort, but also sometimes even spur us to take some kind of action. Research into fear and avoidance behaviors resulting from odor components has already been applied in such areas as measures to prevent crop damage by wild animals, but it has emerged in recent years that olfactory receptors also influence human behavior. Also known as a happy hormone, oxytocin is a hormone that facilitates childbirth, but it also acts on receptors as a neurotransmitter that modulates various social behaviors and olfactory functions.