Well, no, perhaps not. But there are plenty of other ones that work out well, aren't there, to make up for all the ones that might give one nightmares? Cinderella's sisters don't always cut off bits of their feet, and sometimes Cinderella marries them to other members of the court she knows. And even if the frog prince does get thrown against a wall, it doesn't harm him a bit once the curse is finally broken.