Why does a man like the Duke of Harwick leave the room of a club when you enter it?

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

You can hear this line at 01:05:55.029 in the Blu-ray version of the movie.

Quote context

[...]

- Mind you, I don't believe these rumours. I can't believe them when I see you. There aren't any secret vices. Such things write themselves across a man's face.

- You, with your untroubled youth, I find it hard to credit anything against you.

- When I hear all these hideous things that people whisper about you, I don't know what to say.

- I absolve you from the necessity of defending me if that's what's troubling you.

- You can't dismiss these charges so lightly.

- Why does a man like the Duke of Harwick leave the room of a club when you enter it?

- Not because he knows anything about my life, but because I know everything about his.

- But why are your friendships so fatal to people? There was that wretched boy in the Guards who committed suicide.

- What about Adrian Singleton and Lord Wayne's son?

- What gentleman will be seen with either of them?

[...]