Adultery IS a big deal. It's a form of deceit, disloyalty, disrespect, selfishness, and oh, about a hundred other negative vices. It causes much destruction. Let's see, emotional pain, broken marriages, financial ruin, public humiliation, domestic abuse, childhood trauma, lost friendships, and a lifetime of guilt and/or shame (IF you have a conscience) It creates NOTHING positive. It doesn't really matter to the bottom line who chases/seduces who....when, where or how. All of the above happens anyway.
Now, what was that question about society making a BIG DEAL out of Adultery??