Oh, see, I failed to understand that even in poly, a man's status is based on his woman's sexual behavior! If a man can't satisfy his woman (read: control her) while fucking other women himself, all the other men in the village will laugh at him. If she's "taking all comers"* - omigod, they might make him go live in the menstrual hut or something.
*Taking all comers? Oh, that's a charming phrase. That would really make me feel respected, if one of my male partners said that about me.
EDIT: And apparently if you don't agree, you're not a REAL poly person. That explains this USB port in my back - oh my god, I'm an android!