Some people's difficulty with sex has to do with childhood or adolescent abuse, or rape as an adult.  These kinds of sexual problems can be greatly helped with therapy about the original abuse.

Other sexual problems are created by the confusing messages we all get from our culture about sex being both titillating and taboo.  These mixed messages can also be sorted out in therapy so you can have a healthy and pleasurable sexual life.

There are reproductive issues like infertility, pregnancy loss, and abortion, which may have emotional pain attached to them, and which can also disrupt your sexual life.  I have a great deal of experience in this area and have written a book about post-abortion difficulties in particular, called Peace after Abortion.