I cant speak for other religions. But the average infrastructred KJB Church person isnt a religious person at all. Most go for the social gathering aspect and because their parents did so they do (and because like the 10$ donation to kids in Africa etc, it makes them feel better about themselves).
In the KJB Church, the simple act of lust is considered cheating, not the physical act (although that too). Hell, I am cheating right now just thinking about the hottie in the +15 I passed at lunch, is that cheating even though I am not married but dating someone - who kows