Amiri pulled a 'Chicken Soup for the Mother's Soul' moment on me

Amiri and I were cuddled up for our nightly bedtime story/talking.  He likes to talk about how he's a big boy, and Arram is a little boy.  I told him, well, son, you used to be a little boy, do you remember that? 

Yeah.  I was short then.
     Very short.  You were very little.  You wore diapers.
Because I was little.  And I sat in a stroller!
     Yes, you couldn't walk.
What happened before then?
     You were a little baby.  You didn't have any hair.
What happened before then?
     You were brand new, just born.  Tiny and crying, and drinking milk.
What happened before then?
     You were in Mama's tummy.  Before you were born.
Before that? 
     You weren't made yet.
Was I in Mama's head?  (laughing)
     No, you weren't in Mama's head.
(he thought about it for a minute...)
Was I in Mama's heart?
     Yes, Amiri, you were in Mama's heart.