Oh, I get it… you think opening a bottle of wine requires a corkscrew? Well, not according to this drunken French guy:
But then others started doing it:
And later they branched out and shoes were no longer adequate. They did it with phonebooks:
So, the moral of the story is that wine bottles are pretty tough. And if you beat one against just about anything softer than it, you can force the cork to push out enough to grab it with your teeth and pull it out like a drunken Frenchman!