Sexual abstinence or sexual restraint is the practice of refraining from some or all aspects of sexual activity for medical, psychological, legal, social, financial, philosophical, moral or religious reasons.  Asexuality is distinct from sexual abstinence; and celibacy is sexual abstinence generally motivated by factors such as an individual's personal or religious beliefs. Sexual abstinence before marriage is required in some societies by social norms, or, in some countries, even by laws, and is considered part of chastity. Some societies have or had a double standard in regard to chastity.