Exhaustion from caring for young children or aging parents can contribute to low sex drive. In your older years, it may take longer to have orgasms, ejaculate, and become aroused. This can make you less interested in sex and cause dry vaginal tissues, resulting in painful or uncomfortable sex. Also, smoking decreases blood flow, which may dull arousal. What Is Low Libido? Sexual dysfunction usually affects both parties in a relationship and should be discussed together or individually with a mental health professional. However, a drastic drop in testosterone can lead to decreased libido. Here are a few potential causes of low libido in men. She says that until recently, the only studies on women's sexual issues were very small, often short-term, and rarely well designed. Decreased interest in sex is often a result of ongoing issues, such as: Those who had been with their partner for more than a year were more likely to report a tanked sex drive than those in newer relationships. Women, but not men, were also more likely to have low sexual desire if they had had three or more partners in the last year, if they did not share the same bedroom likes and dislikes as their partner, or if they had children under 5 in the household. For the first time, this study looks at the effect of the testosterone patches in naturally menopausal women as well as those who have undergone surgical or early menopause caused by chemotherapy or removal of their ovaries. In the study, researchers found that nearly half of the men who had severe sleep apnea also experience very low levels of testosterone during the night. Certain prescription drugs, especially antidepressants called selective serotonin reuptake inhibitors, are known to lower the sex drive. In the new study, published today in BMJ Open , researchers surveyed more than 11, British men and women between the ages of 16 and 74, all of whom had at least one sexual partner in the past year. Your erections may not be as hard, and it may take longer for your penis to become erect.