What is Law of Demeter?

Let's start with Wikipedia:

More formally, the Law of Demeter for functions requires that a method m of an object O may only invoke the methods of the following kinds of objects:

1. O itself
2. m's parameters
3. Any objects created/instantiated within m
4. O's direct component objects
5. A global variable, accessible by O, in the scope of m

Rule 1:

public class ClassOne {

    public void method1() {
        method2();
    }

    public void method2() {

    }
}

Rule 2:

public class ClassOne {

    public void method1(ClassTwo classTwo) {
        classTwo.method2();
    }
}

class ClassTwo {

    public void method2() {

    }
}

Rule 3:

public class ClassOne {

    public void method1() {
        ClassTwo classTwo = new ClassTwo();
        classTwo.method2();
    }
}

class ClassTwo {

    public void method2() {

    }
}

Rule 4 (thanks @juharr):

public class ClassOne {

    private ClassTwo classTwo;

    public void method1() {
        classTwo = new ClassTwo();
        classTwo.method2();
    }
}

class ClassTwo {

    public void method2() {

    }
}

Rule 5:

?

Can anyone help me with Rule 5?

And doesn't Law of Demeter imply that chaining is bad?

User.getName().getLastName();

This leads to high coupling.

Isn't "Tell, don't ask" a similar principle?

So is this everything? Am I wrong about something? How can you obey Law of Demeter?