“It is not the strongest of the species which survives, nor the most intelligent, but the one most responsive to change.”

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Now it’s your turn. To determine your dating window, count the number of years from when you started dating to when you’d like to enter a long-term relationship. Now, what’s 37 percent of that number? Add that to the age when you started dating. That’s your 37 percent mark.

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Most of us have no idea what kind of partner will fulfill us long term.

Most of us have no idea what kind of partner will fulfill us long term.

relationshopping”— searching for our mate like we’d search for a new pair of shoes. But treating potential partners like potential purchases gets us into trouble.