Ah, the glorious literary energy of "I say, patting my girl butt."

Have you even tried reading the work as a whole? Yuknavitch, especially in Dora speaks to the angry teen girl inside of every person who has ever been an angry teen girl, or loved one.
She's eloquent, powerful, and simply because of two words, ('girl butt,' that's what's going to throw you? Sissy.) you should not discount this writer who has a lot to say to a lot of people.
On the second quote, people do not talk like that, Yuknavitch writes like that. That is the point. It's poignant in a way that we are rarely ever allowed to hear from our fellow humans. In that it's refreshing and poetic.