Emotional cheating is almost as bad as physical. This is more like the preamble the physical. Remember if you walk into a fish shop, only to browse and do not buy the smell remains on you irrespective.
So people make conscience choices that you do not expose yourself in harms way, no matter good your marriage is. A malach is perfect, we humans, bene odom, are not. Try rolling the dice in roulette, is this really any different?
We ask H-shem everyday not to put through nisyonos, don’t create them either.
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