I don't know much about Myers Briggs but I definitely think that it takes certain personalities to relate and function effectively in poly relationships.
I know plenty of guys I won't broach the topic with just because of thier macho homophobic personalities. I mention homophobic because although I am not bi-sexual, to many guys I know sleeping with Redpepper who in turn sleeps with other men is equivalent to a homosexual act. Stupid I know, but the case none the less.
These are the same guys that would probably have no problem having casual sex with lots of women and don't see an issue with that....ironic.
Playing the Game of Life with Monopoly rules.
Monogamy might just be in my genes
Poly Events All Over