Yet only a few people discuss their sexual problems with their doctors.
People who have more sex report higher self-esteem, life satisfaction and quality of life. In contrast, lower frequency of sex and avoiding sex are linked to psychological distress, anxiety, depression and relationship problems, reports CNN.
Sex is, in fact, one of the most basic physiological needs. Yet millions of people spend at least some of their adulthood not having sex.
Researcher, Alfred Kinsey found that up to 19 percent of adults do not engage in sex. This varies by gender and marriage status.
The most common reasons for men avoiding sex are erectile dysfunction, chronic medical conditions and lack of opportunity.
For example, heart disease patients often avoid sex because they are afraid of a heart attack. Other research has shown the same for individuals with cerebrovascular conditions, such as a stroke.
Metabolic conditions such as diabetes and obesity reduce sexual activity. In fact, diabetes hastens sexual decline in men by as much as 15 years. Large body mass and poor body image ruin intimacy, which is core to the opportunity for having sex.
Other research also confirms that women more commonly avoid sex than men. In fact, up to 40 percent of women avoid sex some time in their lives.
The gender differences start early. More teenage females than teenage males abstain from sex.
Women also are more likely to avoid sex because of childhood sexual abuse. Pregnant women fear miscarriage or harming the fetus and can also refuse sex because of lack of interest and fatigue.
Pain during sex is also a big issue.
Chronic pain diminishes the pleasure of the sexual act and directly interferes by limiting positions. The depression and stress it causes can get in the way, as can certain medications for chronic pain.
Personality disorders, addiction and substance abuse and poor sleep quality all play major roles in sexual interest and abilities.
Many medications, such as antidepressants and anti-anxiety drugs, reduce libido and sexual activity, and, as a result, increase the risk of sexual avoidance.
However, few people talk with their doctors about their sexual problems. Indeed, at least half of all medical visits do not address sexual issues.
Embarrassment, cultural and religious factors, and lack of time may hold some doctors back from asking about the sex lives of their patients. Some doctors feel that addressing sexual issues creates too much closeness to the patient. Others think talking about sexuality will take too much time.
Yet while some doctors may be afraid to ask about sex with patients, research has shown that patients appear to be willing to provide a response if asked. This means that their sexual problems are not being addressed unless the doctor brings it up.
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Lead photograph: A still from Murder 2