What is the recipe for a happy marriage? According to a new study, sex is a key ingredient. Researchers have found that sexual intercourse produces an “afterglow” that lasts for 2 days. What is more, this afterglow may boost long-term relationship satisfaction.

Lead author Andrea Meltzer, of Florida State University, and colleagues recently reported their findings in the journal Psychological Science.

A number of studies have shown that sex contributes to short-term bonding between partners, but the researchers note that the majority of couples do not engage in sexual activity every day.

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