Well... it depends on who you ask. For certain, it means we don't have to target each other. We play together in many of the games. And we're allowed to share anything we want with each other, eat, and sleep together.
[goin through our kitchen to supply room]
But it also means helping each other, making up for each other's weaknesses... being able to help when things get too rough on one side. Balancing things.
I'm not sure if I'm a very good partner in that sense... but I think that's what it means.