@redpepper, I think livsen meant it as an expression, although I guess there is no harm in asking.
@livsen, maybe you could read some books about it and suggest them to him? "Opening Up" and "The Ethical Slut" are mentioned often and they deal with various types of non-monogamy as I understand. It could also help you figure out which would be the most appropriate for you specifically.
Me: 31F, straight
Seamus: My husband, 32M, straight
Dragon: My boyfriend, 29M, pansexual, married to Fox
Fox: My boyfriend, 29M, homoflexible, married to Dragon