You're Ugly, Too

The use of characterization in Lorrie Moore's short story You're Ugly, Too permeates every page.  I fell in love with Zoe's character.  I was easily able to relate to her personality.  My family and closest friends are always commenting on my quick-wit and snarky remarks to everything.  She's a smart-alec, and I love that.  Moore clearly shows how flighty and scatter-brained Zoe is; she can't keep her mind on one thing for too long!  While in the middle of a conversation with her sister, Zoe "thought about all the papers on 'Our Constitution: How It Affects Us' she was going to have to correct.  She thought about how she was going in for ultrasound tests on Friday..." (Moore, 358).  She clearly has trouble connecting with any human besides her sister, let alone eligible men that she is set up with!  I think all of her eccentricities are merely barriers to keep anyone from getting too close to her.  She wears a mask of sarcasm and irony so as to avoid the feeling of exposure or vulnerability.  I am confused about the ending; what was the significance of her actions?