(I'm disappointed that no one got this one, so I'll repeat it and add the second half of the quote.)
There are two kinds of men and only two. And that young man is one kind. He is high-minded. He is pure. He's the kind of man the world pretends to look up to, and in fact despises. He is the kind of man who breeds unhappiness, particularly in women. Do you understand? I think you do. There's another kind. Not high-minded, not pure, but alive. Now, that your tastes at this time should incline towards the juvenile is understandable; but for you to marry that boy would be a disaster. Because there's two kinds of women. There are two kinds of women and you, as we well know, are not the first kind. You, my dear, are a slut.