monogamous

A line has been crossed, and two people in a once-committed, monogamous relationship find themselves at odds while living in entirely different parts of the world.

Many birds, on the other hand, are monogamous, which means that competitive pressure is lower and males often live longer.

Lehmiller’s research shows that the opposite is true: Most people report positive experiences when they share their fantasies—even when the fantasy is about opening up a monogamous relationship to other people.

Eagles are mostly monogamous and the pair has nested together for the last seven years.

Two years into our monogamous dating, I wondered where we were headed in our relationship.