Have a flirtatious eyebrow waggle.

Okay, so, he lied. His standards are pretty abysmal. Still, it’s an odd mix of trolling and flirting. If annoys her? Great! If she’s into dead guys? Great!

Beetlejuice is also the son of a much nastier demon, so, he’s teleported himself to a new spot to gauge her reaction. He’s not actively stupid.