I have couples that have closed relationships or open relationships depending on how they feel about the relative health of their relationship.It’s not so dogmatic.” It’s worth noting that their arrangement was ultimately Leah’s idea.

In other words, Leah’s is a generation that has been raised with the concept of sexual freedom and without solid guidelines for how to make monogamy work.

That some brand of non-monogamy would appeal to large numbers of them is thus unsurprising.

In fact, Leah and Ryan are noticing a trend that’s been on the radar of therapists and psychologists for several years now.

Termed “The New Monogamy” in the journal it’s a type of polyamory in which the goal is to have one long-standing relationship and a willingness to openly acknowledge that the long-standing relationship might not meet each partner’s emotional and sexual needs for all time.

"But the other side of me was concerned about what this means in terms of intimacy and how the dynamics would work." When Leah and Ryan met at a wedding four years ago, they didn’t expect to develop this type of arrangement.

Neither of them had had an open relationship before, though it was something that Leah had contemplated.

But Leah and Ryan, 32 and 38, respectively, don’t fit these preconceived ideas. She wears pretty skirts; he wears jeans and trendy glasses.

They have a large, downtown apartment with a sweeping view and are possessed of the type of hip hyperawareness that lets them head off any assumptions as to what their arrangement might entail.

Tonight is one of those nights, and soon Leah will head to Jim’s penthouse apartment, where the rest of the evening, she says, will probably entail “hanging out, watching something, having sex.” “She’ll usually spend the night,” Ryan adds nonchalantly, which gives him a chance to enjoy some time alone or even invite another woman over.