- Why do I do these things for you?
- Because we like each other.

6 seconds sound clip from the Mister Ed - Season 1, Ep. 5 - Stable For Three TV Series.

You can hear this line at 00:08:21 in the DVD version of the movie.

Quote context

[...]

- What do you suggest?

- Run down to the market, buy a few vegetables to stick back into the ground.

- That's pretty sneaky.

- Yeah. I thought you'd like it.

- I'll give it a try.

- Why do I do these things for you?

- Because we like each other.

- Get going.

- Yeah.

- Boy, I got out of that one pretty neatly.

(Mister Ed chuckles)

[...]