With time one gets to know the other person well, and the obvious challenges have been exhausted. All the usual gambits have been tried; the other person’s reactions have become predictable. Sexual play has lost its first excitement. At this point, the relationship is in danger of becoming a boring routine that might be kept alive by mutual convenience, but is unlikely to provide further enjoyment, or spark a new growth in complexity. The only way to restore flow to the relationship is by finding new challenges in it.
