Webster’s dictionary defines "chaste" as follows:

"Not having indulged in premarital or extramarital sexual intercourse." 

Masturbation, oral sex, fornication, adultery, male or female homosexual genital acts, sodomy, contraception and re-marriage after divorce are all violations of chastity and are considered mortal sins by the Catholic Church. These sins are the foundation of the culture of death. Chastity promotes fertility and life.