Next big passion killers are - drugs, cigarettes and alcohol. Cut down or even better stop altogether. The physical work out involved during intercourse is also a certain way to relieve stress but don L-Arginine is a non necessary amino acid and is essential for regular performing of the pituitary gland. Stress, tiredness and low energy levels are known passion killers but you can do something about it and again Ginseng and Ginkgo Biloba are great body tonics. Another great one is: