I did? Huh. [He tries to remember, but nothing.] I have great taste. [Because it bothers him he can't remember, but he doesn't want her to know that. The trademark cheeky grin is pulled out to cover his discontent at the fact he can't remember.]

It's not like I could have read them by myself anyway. Besides, you probably could have told me they were about candy and chocolate rivers, and I'd have believed it. [Because he's assuming she's just on about the fact he was four.]