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An open-ended conversation about finances is a crucial step on the road to marital bliss.

Marriage season is in full swing. Countless couples will step up to the altar this spring. Most will spend a lot of time imagining their blissful life together. Some will make an effort to see how they can communicate better. And a few brave folks will tiptoe into a discussion about each others finances.

If these couples knew that many of the fights they were going to have throughout their marriage would be rooted...