I'm beginning to realize the effects emotions can have on sex drive. I am just about as wanting, if not more so, than my boyfriend. However, in his absence I have noticed that earlier my drive had surged as I was missing him terribly so... but as of late, it has fallen by nearly half. Whenever I do talk to him on the phone or over the internet... I am immediately aroused. Though by the next day, other than fleeting thoughts... I have almost no desire. (Though I am more than happy to joke about sex and related things.. )
So I think emotions can play a key role in heavily influencing your 'natural' sex drive.
"The weakest soul, knowing its own weakness, and believing this truth that strength can only be developed by effort and practice, will, thus believing, at once begin to exert itself, and, adding effort to effort, patience to patience, and strength to strength, will never cease to develop, and will at last grow divinely strong."
- James Allen