A more thorough explanation:

Definition: Plural marriage refers to the practice of having more than one spouse at the same time. It is also known as polygamy.

Example: In some cultures, it is acceptable for a man to have multiple wives. For instance, in some parts of Africa and the Middle East, polygamy is still practiced. In these societies, a man may marry several women and have children with each of them.

Explanation: The example illustrates how plural marriage works in some cultures. It shows that in some societies, it is acceptable for a man to have more than one wife. This practice is often based on religious or cultural beliefs. However, it is important to note that plural marriage is illegal in many countries, including the United States.