Sexual dysfunction (or sexual malfunction or sexual disorder) is difficulty experienced by an individual 

or a couple during any stage of a normal sexual activity, including physical pleasure, desire, preference, arousal or orgasm.

Sexual desire disorders (Hypoactive sexual desire disorder)- Inhibited desire, or loss of libido, refers to a decrease in desire for 

interest in sexual activity.Other causes may be aging, fatigue, pregnancy,or psychiatric conditions, such as depression and anxiety.

Also known as impotence, erectile dysfunction is defined as the inability to attain and/or maintain an erection suitable for intercourse. Causes of erectile dysfunction include diseases affecting blood flow, such as atherosclerosis (hardening of the arteries); nerve disorders; psychological factors, such as stress, depression, and performance anxiety (nervousness over his ability to sexually perform)

Persistent or recurrent ejaculation with minimal sexual stimulation before,on,or shortly after penetration and before the person wishes it.

Recurrent or persistent genital pain associated with sexual intercourse in either a male or a female.

Persistent or recurrent delay in,or absence of, orgasm (climax) following a normal sexual excitement phase during sexual activity

There are many factors which may result in a person experiencing a sexual dysfunction. These may result from emotional 

or physical causes. Emotional factors include interpersonal or psychological problems, which can be the result of work-related stress and anxiety, depression, sexual fears or guilt, past sexual trauma,concern about sexual performance,marital or relationship problems,.

Sexual dysfunction is especially common among people who have anxiety disorders. Ordinary anxiousness can obviously 

cause erectile dysfunction in men without psychiatric problems, but clinically diagnosable disorders such as panic disorder 

commonly cause avoidance of intercourse and premature ejaculation.Pain during intercourse is often a comorbidity of anxiety disorders among women.