Rachel was required to go to Paris for Fashion Week. Ross would be gone for four days at a paleontology conference. Monica needed to be at a client in Chicago for two weeks. Chandler needed to spend a week in Miami for continuing education. These trips out of town were scattered over a period of three months.
Monica and Rachel had decided, together, how their quartet would handle these absences. They didn't want the guys to be at home alone for a lengthy period of time. They trusted the guys, but didn't want to push it. Also, they themselves didn't want to go without. The four met at Monica and Chandler's apartment. They sat around the kitchen table.
Monica began, "Each of us is going to be out of town in the coming months. We think that we should make arrangements ahead of time."
Chandler asked, "Arrangements for what?"
Rachel said, "Arrangements for taking care of our significant others while they are home alone, romantically. It would be an extension of our B&B policy. One of the four of us would be out of town, so it seems natural. Nobody would have to go without release, except whoever was traveling."
Ross asked, "How would that work?"
Chandler, said, "We're out of town for different periods of time, too. Somebody is going to get more, or less, than their share. It could create jealousy."
Monica said, "We've thought of all that. Ross is gone the shortest length of time; four days. So, we swap for four days, each. When Ross is away, Chandler will service Rachel's needs for four days. When I am out for two weeks, Rachel will service Chandler four days. That will be fair, because I'm coming home on the middle weekend. While Rachel is suffering in Paris, Ross has me four days. Finally, when Chandler is in Miami, Ross takes care of my needs."
Chandler and Ross looked at one another, telepathically agreeing. Chandler said, "We are the two luckiest bastards on Earth!"
Rachel said, "Of course, when we say four days, we mean overnight four times."
Rachel's trip came first. Including travel, she would be gone eight nights. Monica was to sleep at Ross's on nights two, four, six, and seven.
Next was Chandler's trip. Ross would sleep at Monica's on nights one, three, four and six.
Monica would be gone ten nights, over two weeks. Rachel would sleep at Chandler's on the second and fourth night of each week.
Finally, Ross would be gone only five nights. Chandler would sleep at Rachel's on nights one, two, four and five.