Polycurious

Yes, just like the lifestyle, no one is made to feel left out; there's something for the "poly-curious" amateur right through to the seasoned "ethical non-monogamist".

Source: wiktionary

Polyamory, a practice of maintaining multiple close relationships as an alternative to monogamy, draws adults of all ages, and online dating has made it easier for the polyamorous and poly-curious to find one another.

Source: wiktionary

Neither of us had an open relationship before we met each other, but we always talked candidly about sex, love, and relationships. Like many poly-curious couples, we tested the water by having threesomes, before branching out and dating individually.

Source: wiktionary

In major cities, there are plenty of ways for non-monogamous and polycurious people to meet, among them apps, dinners, friends, blind dates and parties.

Source: wiktionary