These findings contradict the well-accepted idea of high prolactin levels being linked to men’s sexual issues. The results of this study suggest that the hormone could have a positive impact in initiating or stabilizing male sexual behavior. The study does not prove a cause-and-effect relationship between prolactin and sexual functioning. The researchers speculate that low prolactin reflects a change in the levels of signaling chemicals in the brain that are responsible for regulating sexual behavior. Also, poorer physical and mental health could be an underlying reason for low prolactin and a lower sex drive, said the researchers.
Menopause-related discomfort. As reviewed earlier , the dryness and thinning of the vagina (vaginal atrophy) that follows the drop in estrogen around menopause is the most common cause of painful sex at midlife and beyond. Less estrogen means less vaginal lubrication and a less stretchable vagina. The vagina also may shorten and become tighter at the opening. In some women this can lead to a feeling of vaginal tightness during sex along with pain, burning, or soreness. Inflammation and irritation can also develop (atrophic vaginitis), leading to greater discomfort and sometimes to tearing and bleeding of tissue with any penetration of the vagina.