Why is the French version of Arthur and the Invisibles 20 minutes longer than the English version?

It seams the American version has the "questionable" content deleted. It's another way the French can show how much they love America. LOL I'm kidding! Really! I speculate it has something to do with the "sexual" material (ie: kissing, butt looking, blouse string removing) that made someone decide it wasn't suitable for a PG rated film. Then again, I don't see a reason why those extra scenes would cause the rating to change. It's a mystery! The only fact I know is that the movie is AMAZINGLY, EXTREMELY, SUPERBLY better in its complete version.