Could be we three get along so famously 'cause you two have me and I have you two, too.
15 seconds sound clip from the Chitty Chitty Bang Bang (1968) movie soundboard.
You can hear this line at 00:19:50 in the Blu-ray version of the movie.
Quote context
[...]
- Someone to care for, to be there for. I have you two.
- Someone to do for, muddle through for. I have you two.
- Someone to share joy or despair with, whichever betides you.
- Life becomes a chore unless you're living for someone to tend to, be a friend to. I have you two.
- Someone to strive for, do or die for. I have you two.
- Could be we three get along so famously 'cause you two have me and I have you two, too.
- Someone to care for, to be there for.
- Someone to do for, muddle through for.
- Someone to smile once in a while with whenever you're lonesome.
[...]