Because when you read a book as a child, it becomes part of your identity in a way that no other reading in your whole life does.
5 seconds sound clip from the You've Got Mail movie soundboard.
You can hear this line at 00:27:48.835 in the Blu-ray version of the movie.
Quote context
[...]
- Whatever you do, just don't listen to anything I say, okay? Thank you.
- We'll take that pop-up book as well, the dinosaur book.
- You know, the world is not driven by discounts, believe me. I have been in business forever.
- And I have gotten carried away.
- Yeah. Yeah, you have. You've made me feel...
- Enchanting. Your mother was enchanting.
- How will you be paying for this?
- Cash.
- That you in the photograph? What are you doing?
- Twirling. My mother and I used to twirl.
[...]