It's not just a man's world
We no longer live in an age where women still have to remain faithful to their husbands, despite atrocities being committed against them.
Today’s woman has changed with the times, and so has her definition of a successful relationship as she is open to finding love outside her marriage. Let’s get down to the statistics. A recent UK-based survey revealed that women are cheating more today than ever before. One in five married women has had a fling, the highest number ever recorded.
to read more on this -http://timesofindia.indiatimes.com/articleshow/3685291.cms
But... still, 4 out of 5 are faithful. ;)
Cheaters are the exceptions... but they get more bad press. Perception caused by a few rotten apples.
Determinants - many variables eg. strength of character, religious belief - would probably ensure they don't give up when the going gets tough. Partners with EQ, less egocentric, etc. help a lot to keep it together.
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Life is short. Live it to the fullest!