Exactly. And it feels like we "know" the heart and soul of the person.
In my first marriage, my wife's Grandpa and Grandma were amusing in how they would answer for each other. "Wally wouldn't like that." Or, "Rita would prefer ...." You always wondered if they really knew that, or if it was a fiction to justify their own preferences. Now I know that there's a lot of truth to it.
On the other hand, in many marriages - where the partners felt they knew each other - trust is abused and shattered.
The other partner can come to know the essence of you, but it is up to you to keep it authentic and untainted.
