I see what you guys are saying.

Also today i had this flash of insight:

With a dual, you get psychologically close enough that you not only see things that others may not, but also you feel comfortable criticizing (and you end up doing it in a way that makes the dual think "hmmm, yeah that's true i should work on that"). I guess that's how duals grow together.

With an activity, it's less close. Like someone said, it's like two independent people being good friends, but staying separate. Which isn't bad either, necessarily. I think though that problems would be more likely to simmer and perhaps more likelihood for passive aggression, no?

Assuming my insight is correct, that is. . .