In a recent study, German scientists tested the effects scents can have on someone who is dreaming. Researchers had 15 different people go to sleep and recorded their dreams afterward. While some were sleeping the smell of rotten eggs was pumped into the room, while others were given the smell of roses. These scents were picked due to the fact that they are powerful, but would not irritate the nasal passages causing the person to wake up. Some rooms had no smell at all for control purposes. Those who were given the rotten egg scent had dreams that were emotionally negative, while those that slept with the rose smell in the room had positive dreams.

Researchers feel like this can give us significant insight on how our surroundings affect our moods. If a smell can have an effect on your emotions in a dream, imagine what odors can do to you without you even knowing it! I plan to keep a bouquet of flowers in my room from now on!