The document discusses various types of unconventional relationships, including arranged marriages, shotgun weddings, mail-order brides/husbands, open marriages, polygamy, and group marriages. Arranged marriages are decided by family and common in some cultures. Shotgun weddings occur due to an unplanned pregnancy. Mail-order brides involve women advertising for husbands abroad. Open marriages allow extramarital relationships with partner consent. Polygamy involves marriage to multiple partners. Group marriages consist of marriage-like arrangements between 3-6 adults who share living and child-rearing responsibilities.