hxdn:

one example of healthy polyamory: person a, person b, and person c are dating. every one is fully consenting to be in the relationship.

another example of healthy polyamory: person a and person b are dating. person a is also dating person c, but person b and c would like to remain just friends. every one is fully consenting to be in the relationship.

another example of healthy polyamory: person a and person b are dating, but they both feel it is okay to kiss/hold hands/have sex with other people that they are not dating. this is called an open relationship, and is often considered a form of polyamory. both partners are fully consenting to be in the relationship, and those who are not in the relationship understand and are fully consenting to the romantic acts. boundaries are established and agreed upon by all parties.

there are a lot of different types of poly relationships and poly relationship dynamics, it is not a one-size-fits-all thing. stop telling polyamorous people that their relationships are invalid because you dont like it