"Adultry ... without exception ... leads to domestic violence." I don't know how you are defining your terms, nor how you have come to the conclusion that you (and apparently you alone) are familiar with the consequences of each and every act of adultry, but regardless, your assertion is demonstrably false.
"If you can't be monogamous, then stay single." Great advice--for those able to see the future. The rest of us live one day at a time and make decisions based on the realities confronting us at the time a decision must be made.