Final answer:
Pain during sexual intercourse can have various causes, including physical and psychological factors. Common sexual disorders for men include erectile dysfunction, and for women, vaginismus.
Step-by-step explanation:
Pain during sexual intercourse, also known as dyspareunia, can have various causes. It can result from factors such as vaginal dryness, insufficient lubrication, vaginal infections, or conditions like endometriosis or pelvic inflammatory disease. Psychological factors like anxiety or past traumatic experiences can also contribute to pain during intercourse.
As for common sexual disorders, for men one of the most common is erectile dysfunction (ED), which is the inability to achieve or maintain an erection. For women, one common sexual disorder is vaginismus, which causes involuntary muscle spasms in the vaginal area, making penetration painful or impossible.