Funny Part of the book

I found the part of the book where Tony emailed Libby since she wasn't talking to him and sent her this joke...

I heard a joke today and thought of you... Where do cookies sleep?..... Do you give up? Okay, I will tell you. A cookies sleeps under cookie sheets.

     -t-

And Libby replies...

That was so lame! You know why the cookie went to the doctor, right? Because he was a little bit nuts.

   -L-

I found this funny because it was a really sweet and cheesy joke, but I also found it a little interesting that LIbby wait five months to email back to that? Wow, but it all worked out later on!