Well, it must be an association of ideas. Tomorrow I go to my dentist.
5 seconds sound clip from the A King in New York (1957) movie soundboard.
You can hear this line at 00:34:08 in the Blu-ray version of the movie.
Quote context
[...]
- You know, you're giving me a terrific complex.
- I thought you were crazy, but now I'm positive.
- I thought you liked crazy people.
- Yes, but how can you suddenly branch off into toothpaste?
- Well, it must be an association of ideas. Tomorrow I go to my dentist.
- You know, you really are funny.
- I must tell you some of my jokes. Naughty ones!
- Yes, can't we join in the conversation?
[...]