By the end of their dinner at a small Italian restaurant in New York’s West Village, Leah is getting antsy to part ways with her boyfriend Ryan, so that she can go meet up with her boyfriend Jim. It’s not that she means to be rude, it’s just that Jim has been traveling for work, so it’s been a while since she’s seen him. Ryan gets this. As her “primary partner” and the man with whom she lives, he is the recipient of most of Leah’s attention, sexual and otherwise, but he understands her need to seek companionship from other quarters roughly one night a week. 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. He doesn’t have a long-standing secondary relationship like Leah (“I’ve actually veered away from doing that”), but he certainly enjoys the company of other women, even sometimes when Leah is home. “I like everyone to meet each other and be friends and stuff,” he explains.