50% of Wife Swapping is Enough

It takes four people to swap wives. Or is it less? Two married couples decided to conduct perhaps the most important sexual experiment of their lives. They agreed to meet at a hotel at a specific time. But the universe, as usual, made adjustments to people's plans. A blizzard caused one of the participants to be late. But It's a bad plan that can't be changed. The remaining participants had to improvise - and in the end, it seems that literally everyone was satisfied.