Abstinence pledges are commitments made by people, often though not always teenagers and young adults, to practice abstinence, usually in the case of practicing teetotalism with respect to abstaining from alcohol and other drugs, or chastity, with respect to abstaining from sexual intercourse until marriage; in the latter case, they are sometimes also known as purity pledges or virginity pledges. They are most common in the United States among Catholic and Evangelical Christian denominations, while others are nonsectarian.