Reduced sexual desire: lacking sufficient interest in making love or having an aversion to certain or all forms of sexual contact.
Sexual arousal disorder (problems whit getting sexually aroused): the erection disorder of the man (problems in getting or keeping the penis completely stiff while making love) or problems of the woman in getting aroused (insufficient lubrication of the vagina).
Orgasm disorders: coming too early or not at all.
Sexual pain disorder: having pain while making love (dyspareunia and vaginismus).
Sexual disorders from other causes.
Some sexual problems are not called sexual disorders, but this doesn't mean that they are not important or untreatable.