Every society imposes rules on its members, including rules that restrict and specify when and with whom sex is allowed.

All societies restrict sexual relations between some members. At the very minimum, and almost everywhere, sexual relations with very close relatives (such as between parent and child or between siblings) are restricted. And once married, people are generally expected to live up to whatever rules their society has laid out- although choosing a sex partner is also not always tantamount to choosing a spouse.
Some people may marry in order to gain citizenship of a certain country, in which case the marriage will often remain sexless. But either way, once married, there are specific rules and conventions to live by. These rules are sometimes based on a double standard, where women are expected to be sexually faithful to their husbands, while these husbands are allowed extramarital relations. Ironically, women might, instead of criticizing the double standard, excuse their husband’s wanderings. Remember for example Hillary Clinton, who publicly excused her husband’s affair. Or, deceived women might blame the other woman instead of the husband.
In those cases, the other woman is held responsible while the man’s behavior is interpreted as the result of his inability to control his sexual urges. This happens in parts of Greece as well as in some gangs, where a girl who sleeps with the boyfriend of another girl in the gang is a more likely recipient of the betrayed girl’s fury than the boyfriend.

“A man can sleep around, no questions asked, but if a woman makes nineteen or twenty mistakes she’s a tramp.”

To judge whether one’s indulgence in an affair is right or wrong is open to the concerned person.. It is an occurrence in the normal senses other than the ones that are formed with a conniving attitude.

The debate continues...