They believe each finger of the left hand represents the past, present and future generations within your family. The thumb represents your parents, the index finger represents your siblings, the middle finger represents yourself, your fourth finger represents your life-partner and the fifth finger, your pinkie, represents your future children.
Why? Well I'll show you. Place your hands together and bend your middle fingers together, allowing for your knuckles to touch. When doing this, allow for your other remaining fingers to touch.
Begin to pull each finger apart, individually. You will see that your thumbs will pull apart quite easily because you are not destined to be with your parents forever. The same happens with the index finger and pinkie; showing you’re not meant to be with your siblings and children forever. However, when you try and pull your ring fingers apart, representing your life partner – it’s very hard, meaning you both are meant to be together forever!