People who are successful replace bad behaviors with good ones. That is a legit point. Quitting without something else to fulfill that need generally doesn't work.

Exercise is a great stress reliever and it's an outlet I've seen work for others. As the most general statement people who workout regularly tend to have more respect for their bodies. Is physical activity part of your life together? Of course, there are many other outlets as well... general encouragement to try new things is good.

As a parent, you know any successful long-term relationship isn't just about you. I think it's great you are willing to give the women you love a chance to walk the talk. That said, given your strong feelings about this issue, if you don't see meaningful change in a reasonable amount of time, a serious re-evaluation will be in order.