Right now I'm watching Beauty and the Beast, and it hit me: When the Beast found that Maurice had tresspassed into his castle, he's quick to throw him into the dungeon, but when he found that Belle had entered the castle in search of Maurice, he doesn't put her into the dungeon until AFTER she volunteers to go there in his place.
I mean, what's up with that? She "trespassed" just as much as Maurice did. Unless the Beast doesn't consider looking for his prisoners as trespassing. The beast would have had a right, I think, to just put Belle in the dungeon with her father, instead of accepting her as a substitute.