Yes?

Now that he is 4, I am hoping that his bedtime ritual changes for the better. As it is now (and has been the last 6 months or so), the evening goes like this.

Read story, pray, tuck the boys in. Specifically remind Miles that staying in bed is required.

10 seconds later, from behind the closed gate in his doorway...

Miles: When you go to bed will you tuck me in three times?
Me: Yes, Miles. Get back in bed.
Miles: Will you tuck me in three times if I stay in bed?
Me: Yes! Back in bed!
Miles: You will?
Me: Yes!
Miles: You promise me?
Me: YES!

.....

Miles: Yes?
Me: Yes.

Note: A head nod or non-response is not an option here. He will not quit until "yes!" is uttered from me a zillion times. I don't get it.