sexual immorality(n = noun.act) - the evil ascribed to sexual acts that violate social conventions; "sexual immorality is the major reason for last year's record number of abortions"
is a kind of evil, immorality, iniquity, wickedness

double standard of sexual behavior, immorality, primary sexual characteristic, secondary sexual characteristic, sexual, sexual abstention, sexual abuse, sexual activity, sexual arousal, sexual assault, sexual characteristic, sexual climax, sexual congress, sexual conquest, sexual desire, sexual discrimination, sexual harassment, sexual intercourse, sexual inversion, sexual love, sexual morality, sexual perversion, sexual pleasure, sexual practice, sexual preference, sexual relation, sexual relationship, sexual reproduction, sexual union, sexual urge