Sexual dysfunctions as the name suggests is the inability to initiate, perform or satisfactorily complete the sexual act.

Common types of dysfunction recognized, in women, are

1. Diminished sexual excitement - sexual arousal can only be achieved with great difficulty;
2. Anorgasmia, in which a woman has a recurrent and persistent inability to achieve orgasm despite normal sexual stimulation
3. Vaginismus - woman's vaginal muscles contract strongly during intercourse, making coitus difficult or impossible;
4. Dyspareunia - a woman experiences significant pain during attempts at intercourse

Common types of dysfunction recognized, in men, are

1. Erectile impotence, in which a man cannot sustain an erection.
2. Ejaculatory impotence - a man cannot achieve orgasm in the woman's vagina. He may sustain an erection and may even ejaculate by other methods.
3. Premature ejaculation – a man may ejaculate before or immediately after entering the vagina.