* To avoid social embarrassment. Mating is a very intimate act, and many people feel embarrassed or uncomfortable doing it in front of others. This is especially true if the partners are not in a committed relationship or if they are not well-acquainted with each other.
* To reduce the risk of being caught. In some cultures, mating outside of marriage is considered to be a crime or a sin. Even in cultures where it is not illegal, many people still prefer to keep their sexual activities private to avoid being judged or shamed by others.
* To create a sense of intimacy. Mating is a very personal and intimate experience, and many people feel that it is best experienced in a private setting. This allows the partners to focus on each other and to connect with each other on a deeper level.
* To avoid unwanted interruptions. Mating can be a very unpredictable activity, and many people prefer to do it in a private setting to avoid being interrupted by unexpected guests or distractions.
Of course, there are also some people who enjoy mating in public. This is often seen in the context of public sex clubs or swinger parties. In these settings, people may enjoy the thrill of being watched or the voyeuristic pleasure of watching others.
