Abstinence is a self-enforced restraint from indulging in bodily activities that are widely experienced as giving pleasure. Most frequently, the term refers to sexual abstinence, or abstinence from alcohol or food. The practice can arise from religious prohibitions and practical considerations. Abstinence may also refer to drugs. For example, one can abstain from smoking. Abstinence has diverse forms. Commonly it refers to a temporary or partial abstinence from food, as in fasting. In the twelve-step program of Overeaters Anonymous abstinence is the term for refraining from compulsive eating, akin in meaning to sobriety for alcoholics. Because the regimen is intended to be a conscious act, freely chosen to enhance life, abstinence is sometimes distinguished from the psychological mechanism of repression. The latter is an unconscious state, having unhealthy consequences. Freud termed the channeling of sexual energies into other more culturally or socially acceptable activities, "sublimation".
Abstinence may arise from an ascetic over indulgent, hasidic point of view in natural ways of procreation, present in most faiths, or from a subjective need for spiritual discipline. In its religious context, abstinence is meant to elevate the believer beyond the normal life of desire, to a chosen ideal, by following a path of renunciation.
Hindus observe fast once in a fightnight on the auspicious day of Ekadashi (Eleventh Day). This is done to please Lord Sri Krishna by keeping themselves busy in religious activities on this day.
For Jews, the principal day of fast is Yom Kippur, the Day of Atonement.
For Muslims, the period of fasting lasts during the whole month of Ramadan, from dawn to dusk.