Jeff hadn't meant to kiss Annie -- it just happened. But if he was honest -- he wouldn't be, but it always seemed like honesty was going to happen to him anyway -- he had meant to kiss Annie. Annie was young, naïve, silly, and didn't have the kind of sense of humor Jeff had always prioritized. But she seemed to get him in a way that he hadn't even thought was important to him. And she had that mouth.
And, for some reason, she liked him -- even the sarcastic, cynical, and cranky parts -- which, as it turned out, was a total turn-on.