Buddhism considers celibacy as the monastic ideal. For he who feels that he cannot live in celibacy, it recommends that he never commit adultery with another's wife. Engaging in sex outside of marriage, with the wife of another man, with a girl who is engaged to be married, or a girl protected by her relatives (father or brother), or extramarital sex with prostitutes, ultimately causes suffering to other human beings and oneself. It should be avoided, state the Buddhist canonical texts.