Take my advice. When your wife begins to act unnaturally kind, kiss her, but don't take your hands out of your pockets.
8 seconds sound clip from the Mister Ed - Season 1, Ep. 5 - Stable For Three TV Series.
You can hear this line at 00:05:54 in the DVD version of the movie.
Quote context
[...]
- She's setting me up for something. I can feel it in my wallet.
- Just because a wife is nice to her husband doesn't mean she wants anything.
- How long have you been married?
- Did it ever occur to you that Kay is being nice to you because she loves you?
- Why did you destroy our neighbor's barbecue?
[...]