As if online dating wasn’t hard enough, now users have to sift through profiles looking for increasingly expansive definitions of what it means to be in a committed relationship. Many people using dating apps are on them looking for “the one.” Increasingly, they’re running into profiles of people looking for a second, third, or fourth.

The monogamists say mainstream dating apps are being inundated with users who are in consensual open relationships, and they’d like them to go find their own app. Others say the apps are for people of all relationship styles and, as long as they’re up front about it, what’s the problem? The profiles clearly state: “ENM.” The letters stand for ethical nonmonogamy and more often than not, aren’t spelled out.

In late 2022, one dating app rolled out the ability for users to designate their “relationship type” at the top of their profile and whether they are monogamous or not, which the company says was a response to the needs of Gen Z.

“Gen Z is the most fluid generation in terms of their sexuality and identity, and they need their relationships—and their dating app as the meeting point—to support their openness to different types of connection,” a Hinge spokesman says.

A 2022 survey of more than 14,000 dating app users globally found that 16% of Americans have recently considered an ethical non-monogamous relationship. And around one-third of Americans describe their ideal relationship as something other than complete monogamy, according to a 2023 YouGov poll.