CNM partners reported taking more precautions than those in monogamous relationships in terms of greater condom use during intercourse with all partners and a higher likelihood of STI testing. Thus, although persons in CNM relationships had more sexual partners, the precautions they took did not appear to elevate their rate of STIs above an imperfect implementation of monogamy. Lehmiller JJ. A comparison of sexual health history and practices among monogamous and consensually nonmonogamous sexual partners.
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Justin J. Lehmiller (2015) studied this question.
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