Editor’s noteWhile hormones, sleep, PMS symptoms, and energy all play a role in libido, so does your relationship with your sexual partner. Before you overanalyze what hormone is doing what thing each day, make sure you have the basics of a healthy relationship covered and your needs met outside of the bedroom. After all, there’s nothing better to spark libido than a passionate, healthy relationship (even if that relationship is noncommittal, it still matters).Â