I don't think of any sentence as a "one-liner", but I do pay attention to how people actually speak when they are being funny. Rhythm is key.

shopping for clothes is like masturbation - everyone does it, but it isn't very interesting and therefore should be done alone, in an embarrassed fashion, and never be the topic of party conversation.

Perhaps we had at last reached that stage of intimacy that destroys intimacy.

Pleasantness was the machismo of the Midwest. There was something athletic about it. You flexed your face into a smile and let it hover there like the dare of a cat.

I did think reviewers were supposed to be polite about story collections - collections are rather delicate creatures in the literary environment - but not everybody got this memo, I guess.

You know, as fiction writers, if our instincts are off, we can't pay our bills.

When she packed up to leave, she knew that she was saying goodbye to something important, which was not that bad, in a way, because it meant that at least you had said hello to it to begin with.