One of Reagan's aides was all concerned if Reagan new all of the "answers" to that he was going to give at some big conference (G8?).
"So, if they talk ask about "x" what are you going to answer". Reagan said "Well, I think I'll just follow Maggie's lead on that one". The aide said Reagan knew the general ideas of things, and more importantly perhaps, knew who he could rely on that thought the same way he did.
Seems to me that when a kitty-cat can scratch back, it makes the coupling more fun...