As someone who's very paranoid about germs, I'm not down with the salad tossing. I suppose if she's clean and shaved and clean clean clean clean it wouldn't hurt as long as you use mouthwash later or some shit.
As for her licking your ass... not my cup of tea, personally. I know what my asshole is like.
My girlfriends asshole is odorless. Mine is not. No matter how hard I try. It just has a faint odor. I would personally be like ewwwwww fuck that shit.
But everyone's different. What's stopping her if she wants to? You? If she feels like slurping your corn chute let her.