A husband is a male in a marital relationship, who may also be referred to as a spouse. The rights and obligations of a husband regarding his spouse and others, and his status in the community and in law, vary between societies and cultures, and have varied over time. In monogamous cultures, there are only two parties to a marriage, which is enforced by laws against bigamy and polygamy. Traditionally, the husband was regarded as the head of the household and was expected to be the sole provider or breadwinner, a role that continues in some cultures (sometimes described as paternalistic). Today, a husband is not necessarily considered the breadwinner of the family, especially if his spouse has a more financially rewarding occupation or career. In such cases, it is not uncommon for a husband to be considered a stay-at-home father if the married couple have children. The term continues to be applied to such a man who has separated from his spouse and ceases to be applied to him only when his marriage has come to an end following a legally recognized divorce or the death of his spouse. On the death of his spouse, a husband is referred to as a widower; after a divorce, a man may be referred to as the "ex-husband" of his former spouse. The term husband refers to Middle English huseband, from Old English hūsbōnda, from Old Norse hūsbōndi (hūs, 'house' + bōndi, būandi, present participle of būa, 'to dwell', so, etymologically, 'a householder'). At the conclusion of a valid wedding, the marrying parties acquire the status of married persons and, while the marriage persists, a man is called a husband. In heterosexual marriages the woman is called a wife; in same-sex marriages between males, each male is called a husband. Although husband is a close term to groom, the latter is a male participant in a wedding ceremony, while a husband is a married man after the wedding and for the duration of the marriage. The term husband refers to the institutionalized role of the married male, while the term father refers to the male in context of his offspring, a state which may or may not indicate that a marriage ceremony has taken place.