Should cheating be illegal?

Je

In high school I remember we had a class discussion regarding whether or not cheating on a significant other should be punishable by law if you can prove it. A lot of the class said yes, some said no and a few said cheating sometimes is necessary, for example if you are in an abusive relationship and unable to leave, in order to get that affection you'd go to someone else.

What do you think? Sorry if this has been posted before, if so I'll delete.

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