Polyamory is a somewhat new lifestyle that has some similarities to swinging but many differences. Polyamorous people want to have multiple love relationships, but that can look really different depending on each person. Some people like to have one primary partner who is more or less like a girlfriend, or a wife, and have other secondary partners for fun dates and hook ups. Other poly people enjoy having unique situations where different partners are equal.
Polyamory makes a lot of great opportunities for group sex and alternative relationships. Some people fall in love with more than one person, and have a relationship called a triad, which is when three people are in a serious relationship together. There are other relationship shapes in polyamory like squares, pentagons and more, but a triad is probably the most common, besides couples of course.
Being in a polyamorous relationship is not the easiest thing in the world, but it is really fun. Polyamory requires a lot of honest communication and clear self reflection, so you can know what you really want in a relationship with multiple partners. However, the fun part is that polyamory usually has built in threesomes and crazy sex parties!