Are we mainly talking about the stuff in the morning?
Then I would talk mainly about the sensations in her body.
He seemed to talk mainly out of the side of his mouth.
"Ellie might be in trouble," he said, talking mainly to himself.
I shall be talking mainly about conferences, because they are the most common.
But like you say, it was mainly talking with each other.
The first three songs talk mainly about the main character and his girlfriend, at the beginning of their relationship.
We talked mainly by phone, although we did meet in person a couple of times.
As far as social policy is concerned, I should like to talk mainly about two points.
Up till now, we have been talking mainly about the economic crisis.