The order of Nashim primarily deals with all things that relate to marriage: The life of the couple, the financial aspects of the relationship between a husband and wife, widowhood, levirate marriage, the halakhot with regard to forbidden sexual relationships, unfaithful spouses, and the willing dissolution of a marriage. It also touches upon vows and naziriteship. It is only tractate Kiddushin, the final tractate in this order, that is primarily devoted to the different elements of the act of Kiddushin, betrothal.