So, I think I noticed something near the end that no one I saw the movie with seemed to notice or agree with.

When Pennywise was holding Bev by the throat, and she is unafraid, he confirms her lack of fear by smelling her, and her lack of fear is repulsive to him. So he resolves to make her fear him.

He opens his mouth and puts Bev in a trance that is only broken by the new kid's kiss.

The thing I saw is that Pennywise's mouth opened up like a tooth-infested vagina. It was the same shape and detail of a vagina, opening slowly, with three lights in the back of the throat. Bev seeing this is what threw her into a trance.

So the theory is that Bev's major fear is of womanhood, hence Pennywise's vagina mouth. She fears sexuality, sexual experience and how all of it naturally comes with growing up. Which blends seamlessly with the rest of the themes surrounding her character, what with the implied sexual abuse, her father, the rumors, the tampons, and blood.

And perhaps the only thing to save her from the trance was the innocence of the new kid's kiss. The innocent, childlike sort of true love snaps her out of the trance as she realizes who wrote really the January Embers poem.

I still do not know the significance of the lights in the back of his throat, nor of the trance itself.

But that's it! Did anybody notice this? Any alternative theories? Am I crazy? Sound off!