Lux Flakes remind me of women.

5 seconds sound clip from the The 39 Steps (1937) classic radio play.

You can hear this line at 00:41:34 in the radio play.

Quote context

[...]

- For instance, there's a machine, recently developed in this country, so delicate and so accurate that it can etch an invisible secret message on a surface no larger than a grain of corn.

- Or, to employ a commodity with which, perhaps, you're more familiar it could etch the map of an entire country on a single Lux flake.

- And that's probably the finest, thinnest and most fragile thing I can think of for the moment.

- I know that you can read through a flake of Lux, Major. It's actually only two one-thousandths of an inch thick.

- I see. Almost as amazing as this machine I'm speaking of.

- Lux Flakes remind me of women.

- And women, in turn, recall an amazing spy story I encountered during the World War.

- It concerns a Swiss opera singer who volunteered in the French Red Cross as an entertainer.

- For two years she made periodic visits to a home in Switzerland, each time using the same route, over the French border.

- One day she started to cross and found a new officer in charge.

[...]