Attached to monogamy? Avoidance predicts willingness to engage (but not actual engagement) in consensual non-monogamy.
Moors, A. C., Conley, T. D., Edelstein, R. S., & Chopik, W. J. (2015). Attached to monogamy? Avoidance predicts willingness to engage (but not actual engagement) in consensual non-monogamy. Journal of Social and Personal Relationships, 32(2), 222-240.