It doesn't sound foolish to me at all.

2 seconds sound clip from the The Picture of Dorian Gray movie soundboard.

You can hear this line at 00:04:23.745 in the Blu-ray version of the movie.

Quote context

[...]

- If I'm going to keep visiting you, I'll have to send some good sherry.

- Why didn't you intend to tell me his name? I can't explain.

- As I've grown older, I've come to love secrecy.

- I suppose that sounds foolish to you.

- Come into the garden.

- It doesn't sound foolish to me at all.

- You forget that I am married and that the one charm of marriage is that it makes a life of deception absolutely necessary to both parties.

- I believe you are really a very good husband, Harry, but that you are thoroughly ashamed of your own virtues.

- Your cynicism is simply a pose.

- Being natural is simply a pose and the most irritating pose I know.

[...]