Only words.... often loud words as we would get excited or try to drown the other one out to get our points across.
And to make it even more interesting, both Heike and I are highly intuitive logical thinkers. I can often go from step A to step E, but then I have to go back and try to figure out why my subconscious went that direction (it is correct 90-95% of the time, but I have no idea why until I figure it out hehe). Heike on the other hand, can go from A to J and she already knows the reasons why.
To say that our conversations could sometimes seem to really skip about would be a bit of an understatement.... heheh