Smell the roses
If your room smells like a foot had a baby with a Taco Bell, your dreams might be suffering the consequences. A small study out of Germany exposed 15 sleeping volunteers to the smells of either roses or rotten eggs during REM sleep, the most active dream state. Upon waking, the volunteers were asked to describe the overall feeling of their dreams. Every single participant reported having positive dreams when exposed to the smell of roses, while most reported negative experiences with the rotten eggs. If rotten eggs sound appetizing compared to your bedroom's "musk," it might be time for some air freshener.