So, violating vows of fidelity isn’t a big deal to you? To build with your spouse something bigger than both?
Most societies in the world frown on adultery, and sometimes, it’s a crime with penalties ranging from fines to death penalty. Even in jurisdictions where it’s not a crime, adultery can still be a cause for divorce and bring civil penalties to the wrong-doers such as less favorable property settlement, alimony and custody of children and sometimes even third parties.
So, it’s not a matter of “nagging bitches.”