Marshall: Good little girl, always picking a fight with
me. You know that I’m bad, but you’re spending the
night with me. What do you want from my world? You’re a good
little girl.

Fionna: Bad little boy, that’s what you’re acting like.
I really don’t by that you’re that kind of guy. And if
you are… why do you want to hang out with me?

Marshall Lee: -hisses and chuckles-

Marshall Lee: Don’t you know I’m a villain?
Every night I’m out killin’, sendin’ [bad word] 
like children. I know why you’re mad at me. I’ve got
demon eyes and they’re lookin’ right through your
anatomy, into your deepest fears. Baby, I’m not from
here. I’m from the Nightosphere. To me you’re clear,
transparent. You’ve got a thing for me girl. It’s
apparent.