Izzy wasn't preaching anything. She didn't give a shit if anyone was like her, and she didn't expect anyone to be either. And she wasn't inexperienced by any means - she'd misplaced her virginity back when she was fifteen.
It was simply her experience with girls like that in high school - the popular girls who spent their free time primping, talking about their boyfriends, putting everyone down, and making her life a living hell for years on end that had her defenses up and her claws out. She hadn't always been a sarcastic little bitch, she'd grown into one out of necessity.
People tended to think that teens were too young to get anything, but life could actually be compared to high school pretty easily.
Guys like Browning, the jocks, the bullies - the ones who treated girls like shit because they could - guys like that just grew older, they didn't grow up. And Izzy recognized that same assholery in him that she saw in plenty of boys in her class. And yet girls still flocked to them because their self esteem was so low that any guy looking at them, asshole or not, was better than being single and labeled a loser.
"Yeah," Izzy replied. "Bye." She kept walking, but stopped after a moment, turning to face her. "By the way? If you recognize he's a douchebag, I don't know what kind of messed up self confidence issues you must have to be looking at Browning like he's a prize. You're cooler than that, Kentucky." She meant it, too. There weren't many people cool enough to play Ship's Mast and the girl had a rebellious streak that Izzy liked.
With that she turned around and continued her trek to the motel.