Anxiety and physical, emotional, or relationship issues can interfere with a person's or couple's ability to enjoy or participate fully in sex.

Some may want sex three times a day; others, three times a year. There is no "right" or "normal" level of desire. Differing levels of desire are a problem only if a couple can't find a mutually satisfying compromise.

Your body usually tells you when you are in danger—your heart races, you breathe hard, your palms sweat. But when it comes to sexually transmitted diseases, you may not have any warning signs.

Chlamydia is the most frequently reported bacterial STD by far in the United States—and it can cause serious complications and infections for both men and women if left untreated.

If you have herpes, you’re not alone. Millions of Americans have it. Herpes has no cure. But you can control it and learn how to protect yourself and others from outbreaks.

Condoms can help protect you from most STDs, but they’re not perfect. Sometimes they break. A condom can break if it’s put on the wrong way.

Homosexuals and heterosexuals alike are at risk. Infected people can pass HIV on to anyone with whom they have intimate contact. Men can infect female or male partners, as can women.

Is vasectomy the right birth contol method for you? Because a vasectomy should be considered irreversible, it's a serious step to take. You and your partner should understand all the facts and share in the decision.

The no-scalpel procedure is similar to a traditional vasectomy in many respects, but it’s done without incisions or stitches and generally results in faster healing.

During a vasectomy reversal, the two cut ends of the vasa deferentia are reconnected. If the procedure is successful, sperm can once again travel to the penis and leave the body during ejaculation.

Unwelcome behavior of a sexual nature is known as sexual harassment. This type of harassment may create unpleasant working conditions or make sexual favors the basis for employment.

The reproductive system is the system that allows the human body to replicate itself. These are the parts of the body that are involved in sexual function.

When choosing a method, you should consider how often you have sex, if you are in a monogamous relationship, if you are willing to plan for sex, or want a method that doesn't depend on planning.

If a man frequently has erection problems, it can be a sign that something is physically or emotionally wrong.

Testicular cancer most often affects men between the ages of 15 and 39. The good news is that a simple monthly self-exam can help find trouble before it gets serious.

If you have pain, if the veins become unsightly, or if you and your partner are having trouble conceiving a baby, your doctor may advise surgery or another procedure to close off the enlarged veins.

Peyronie’s disease is difficult to cure. Counseling may be recommended to help you cope with the effects of the disease and to help you and your partner find ways to overcome it.