What she may be to me in the future is a private matter.
I'll have you know my writing is a private matter.
It was a private matter, and she had seen no need.
We are going to speak of a private matter alone.
Her love was still a private, personal matter at this point.
"This is a private matter between the girl and me."
For the most part, religion is a private matter here, not a political one.
Now we start to talk about private and personal matters.
Religion is a private matter and should not become an issue in any political campaign.
This is a private matter, not one of the public events for the trip.
