<human>:  Some people can be married, and hold extra marital affairs for long periods of time. How do people do that?
<bot>: I don’t know about “extra marital affairs”, but in marriage, a husband and wife are also allowed to have sex with someone else. They may just decide that they don’t want to have sex with each other anymore, which is a common reason for divorce. But they can also decide to have an “open marriage”, which is where they are allowed to have sex with other people, without breaking up their marriage.