Wow, this thread looks like fun! I'm not an astrologer, never will be, only an astrology enthusiast--just want to clarify that.
With the twins Jade knows, I kind of wondered if the girls are doing side by side simultaneous expressions of their Sun and Moon energies. The "simultaneous" part is really cool--those of us who aren't twins could never express our Sun and Moon energies separately and distinctly.
There's been alot written on twins including the theory of the "introverted" and "extroverted" twin--perhaps this relates astrologically to Sun and Moon. What really fascinated me is that somehow, these tiny children have intuited which energy the other has chosen to express and instinctively completes the unity of twinship by displaying the other. Children like to tell us about themselves, and in this case, it sounds like one twin is saying, "This is who we are" and the other is saying, "Yes, that's true, but we're this, too."
With the Gemini sisters AG knows, who appear to be different as night and day, I wondered if that might have something to do with the duality of Gemini. The one sister has an addiction, so I also wondered if the sisters' charts had some sort of hard aspect to either Neptune, the 12 house, or the house ruled by Pisces in their charts. With the duality of Gemini it would be possible for one twin to express that energy one way, and the other to choose a completely different expression of the exact same aspect.
I've gotta tell ya--the one that really got me thinking was AG's example of the Leo twin brothers. At first I was hard pressed to figure out how two guys with the pride of the Lion, PLUS a sun that was ruled by the sun, would or even could co-rule the same domicile. I spent a lot of the afternoon thinking about it. What I came up with was the possibility that a proud Leo might not even entertain the thought there could be another "just like him", which could provide a sort of immunity from the kind of territorial stuff you'd normally expect. The other thing I wondered was if, maybe, immune from the threatening thought of a territorial rival, Leo might enjoy the visual of someone who was "seemingly" identical. He'd have an opportunity to watch himself at home, at play, sleeping, eating, you name it, without ever having to bother himself to go to the mirror. Leo might like that, so much that he'd want to keep his living mirror around all the time, which might be one reason why these guys live together so compatibly.
Then I got into thoughts of how they're both married, have families, etc., and how THAT would work compatibly. The possibilities are mind-boggling, and I'm sure a lot depends on the charts of the two wives, but I thought the guys might have a 4th house moon, possibly in Aquarius--even though it would be opposite their sun sign, an Aquarius moon would allow them to co-exist harmoniously, but detach whenever necessary to function as part of a separate family. It might also provide the innovative quality necessary to make such an unusual living arrangement work.
Like I said, that was fun--thanks, Jade, for a real mindbender ! : ))
Kalin