However, you said that you know a few real witches.
1. Give me an example of a real spell.
2. Have you ever actually seen one of these witches you know, cast a real spell? I'm, not talking about mouthing incantations. I'm talking about results. It's a simple question and a simple yes or no will suffice.
BTW, princes into frogs represent most of the kind of "spells" taking place in Potter.
Word to the wise: it is NOT a good idea to post a spell on FR.