Of course, I can't really think of anything I've never done.
4 seconds sound clip from the Breakfast at Tiffany's movie soundboard.
You can hear this line at 01:08:21 in the Blu-ray version of the movie.
Quote context
[...]
- You know something? I haven't got around to telling her about it yet.
- Look, why don't we go out and have a drink, or take a walk or something to celebrate?
- All right. I think there's some champagne in the icebox. Why don't you open it while I get dressed?
- Of course, I can't really think of anything I've never done.
- Sure it counts. Now we're even.
- It isn't that I give a hoot about jewellery, except diamonds, of course. Like that.
[...]