Well, it's a phase.

3 seconds sound clip from the Notorious (1948, Lux Radio Theatre) classic radio play.

You can hear this line at 00:08:55 in the radio play.

Quote context

[...]

- Will I be staying here?

- I wish I could tell you. I don't know.

- When will you know?

- Soon, I think.

- Prescott's meeting now with the Brazilian intelligence.

- Oh, so you fixed dinner, huh?

- Have time for another drink?

- Thanks, I've had enough.

- Well, aren't you impressed? I'm practically on the wagon.

- Well, it's a phase.

- You don't think a woman can change?

- Sure. Change is fun. For a while.

- For a while.

- You've been sober for ten days now and as far as I know, you've made no new conquests.

- Well, that's something, isn't it?

- Ten days. Practically whitewashed.

- What a rat you are. I'm very happy, Dev. Why won't you let me be happy?

- Nobody's stopping you.

[...]