Abstinence connotes a voluntary restraint of any activity or indulgence, but the word often is used to describe self-denial in eating, drinking, or sexual intercourse. Allergic reactions are a common reason for abstention from some foods, as one man may avoid eating shellfish another strawberries. Some organic ailments demand abstention from specific foods; gall- bladder patients, for instance, are instructed to abstain from eggs, as well as all foods rich in fat. Alcoholics must practice total abstention from liquor, as must patients using certain medications. Sexual abstinenee may be recommended for women in late pregnancy.