I know, you're probably one of those cheerful people who dot their I's with little hearts.
5 seconds sound clip from the When Harry Met Sally... movie soundboard.
You can hear this line at 00:05:45 in the Blu-ray version of the movie.
Quote context
[...]
- Suppose nothing happens to you.
- Amanda mentioned you had a dark side.
- Sure.
- Why, don't you have a dark side?
- I know, you're probably one of those cheerful people who dot their I's with little hearts.
- I have just as much of a dark side as the next person.
- That, my friend, is a dark side.
- That doesn't mean you're deep or anything.
[...]