What about her body? The title reference's Jennifer's Body but the topic is only adjacently addressed in the picture
Should pictures more directly address the topics of their titles or should pictures have the freedom to not directly address topics from?
I think there's a couple layers. Her body is a vessel for a demon. Her body is objectified by men. Her body is her own pride and tool for seducing men before and after she is possessed. (Her appearance in general is basically the only beautiful or desirable thing about her since she has a bitchy personality.) And the word "body" just calls to mind something both horror themed and sexual.
Honestly, there could have been a better title, maybe one more punny and clever that references being a teenager, demons, succubi, etc. But if a movie wants to have a weird, unclear title, that's fine with me. These days so many movies and titles are dictated by SEO rather than creativity, it'd be nice to see something odd more often.