很多人到他们结束一段感情，或者是走向婚姻，或者是他们爱情的火焰熄灭的时候，他们才明白这个道理。
Most of us discover this truth at the end of a love affair or else when the sweet emotions of love lead us into marriage and then turn down their flames.
我们不要觉得那些永恒不变的需求才是一段感情的基础，当需求变化了就觉得感情也结束了。
But we do not have to base a relationship on these same needs forever and feel that the relationship is over.
研究数据的另一个问题就是，它不能分辨什么时候回答者会做出不忠的事来：在婚姻出现问题之时，还是一段失败的感情结束之时？
Another problem with the data is that it fails to discern when respondents cheat: in a troubled time in the marriage, or at the end of a failing relationship.
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