Look, it’s time we stop being so perfect and be who we really are. We’re crazed, sweaty animals. We’re not unicorns, we’re women! And we take what we want!
Hey so imagine if when Bill ripped Dipper's soul out of his body, he actually had to, like, fly into it to inhabit it, but he was sparring with Dipper's soul for a little while, so Dipper's body kinda just remained a lifeless corpse for a minute.