perfect stranger

“At the worst period in her life, along came this perfect stranger, Sam Lutfi,” Rohde said in his opening remarks.

Already in the planning stage, Romney showed he does not know how to be a perfect stranger.

Well, I'm sure I should have thought it was if a perfect stranger flung herself in my way like that.

Don't you think it easy sometimes to pour out confidences to a perfect stranger?

She would meet him as a perfect stranger, declare her surprise at his claiming her for his cousin.

You can't go direct to that man, a perfect stranger, and convince him of anything.

This Turkish custom of marrying a perfect stranger seemed to me terrible, and I spoke of it to my young mistress.