It makes accomplishing long-term goals easier.

Whether it's paying down debt, increasing retirement contributions, or starting a side job to test out a career change, Martinez said a couple can accomplish extraordinary things together when they commit to a goal.

"I've talked to couples who have retired in their 30s and 40s because they live on one income and invested the rest," she said.

Talking about these goals and how to achieve them together can be a good way to ease into the topic of finances, Martinez said.

"Discuss with each other what you'd like to do in the next year, five years, and beyond," she said. "Then you can slowly open up about what things you'd like to do financially to get you to that point."

[Photo via Reshot]

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