Does it matter if the property has a nice or nasty smell? An important discovery is that unpleasant odours tend to have more of an impact on moods than pleasant odours (Ehrlichman and Bastone, 1992). Relaxation The effects of fragrance can have a significant impact on relaxation and physical arousal. ... Certain smells can also enhance relaxation and reduce stress. According to … Continue reading HMMM It smells nice in here!