Practicing Methods

challenge33.js

function zodiacInfo(sign, dates, element) {
  this.sign = sign;
  this.dates = dates;
  this.element = element;
};

//object literals:
var aquarius = {
  sign: "aquarius" ,
  dates: "1/20 - 2/18" ,
  element: "air"
};

var pisces = {
  sign: "pisces" ,
  dates: "2/19 -3/20" ,
  element: "water"
};

var aries = {
  sign: "aries" ,
  dates: "3/21 - 4/19" ,
  element: "fire"
};

var taurus = {
  sign: "taurus" ,
  dates: "4/20-5/19" ,
  element: "earth"
};

var gemini = {
  sign: "gemini" ,
  dates: "5/21 - 6/20" ,
  element: "water",
  // a method
  astrologyMethod: function() {
    return "If your birthday is between "+ this.dates + ", then your zodiac sign is " + this.sign + ", and your element is " + this.element + ".";
  }
};

gemini.element="air"; // change an object literal's value

function astrologyMethod () {
    return "If your birthday is between "+ this.dates + ", then your zodiac sign is " + this.sign + ", and your element is " + this.element + ".";
};

astrologyMethod ();

console.log(gemini.astrologyMethod());
console.log(astrologyMethod());

console.log(astrologyMethod(myvar)); -- why doesn't this console run?

Do I need to bind?

Ok here's an overview of what I want to accomplish:
I've made 5 object literals, and one has a method which concatenates three values (sign, date, and element) into a simple sentence. I want to

• write a function that will replace the method -> i.e. I can have one function that can console log the concatenation rather than use a method within every object literal.
• take it a step further and loop the function, so it can console log every concatenation for every variable.

What I don't know is if I need to push the variables into an array and if I need to bind this to the values..?