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Although there are many circumstances in which humans utilize olfactory cues for communication, there is no authentic pheromone that has been chemically identified, i believe there is no classic sex pheromone in humans that elicits attractive behavior to the opposite sex. But there are probably crucial odors that affect each other's emotions - for example, a baby's head smell that parents sniff and feel happy, and a woman's axillary (underarm) odors that affect the emotions of males.