There are many factors that can influence your sex drive. Sometimes you may just want to turn over and sleep. At other times you may want to get frisky with your partner. It will not affect your relationship with your partner if you are in the mood most of the time. But if you constantly plead a headache to get out of any intimacy then there might be something wrong with you. Your low sex drive may actually be a disorder. And it is called hypoactive sexual desire disorder (HSDD). This is also known as female sexual interest/arousal disorder (FSIAD).