For many Christians, sex and sex alone is the key to the dissolution of a marriage. The rub is that if you are humane about divorce you cannot be biblical, and if you are biblical you cannot be humane.
Can that have been Jesus' intent in his remarks about divorce? In Mathew 19:9, Jesus says, "I tell you that anyone who divorces his wife, except for marital unfaithfulness, and marries another woman commits adultery." Christians have understood Jesus' words here and elsewhere to mean that divorce is never, ever allowed except for cases of sexual infidelity. Is that what Jesus' intended us to believe?