Okdokey,
I think there are a few things that affect libido.
Tiredness and stress are libido killers.
I believe there is a nutritional basis for wellbeing and libido too. For me, the key for brain function and libido is naturopathic strength magnesium chelate. My DP and I really noticed a difference in memory etc and libido. I also had my hormones rebalanced naturopathically.