Religion and marriage were also issues that the Spanish missionaries wanted to reform. Polygyny was not uncommon, but was mostly confined to wealthier chieftains. Divorce and remarriage were also common as long as the reasons were justified. Accepted reasons for divorce included illness, infertility, or a finding better potential to take as a spouse. The missionaries also disagreed with the practices of paying dowries, the "bride price" where the groom paid his father-in-law in gold, and "bride-service", in which the groom performed manual labour for the bride's family, a custom which persisted until the late 20th century. Missionaries disapproved of these because they felt bride-price was an act of selling one's daughter, and labour services in the household of the father allowed premarital sex between the bride and groom, which contradicted Christian beliefs.