This is ability. A kid learn from their parents what is joy, what is love, what is good and what is not good. If mom loves super how much, the kid will love everyone just like she taught him when he grow up. Only others can teach you and show you what is love. That's why orphans usually have problems with their own families. Because if you never seen how to show others love and how feel it, you never be able to give it to others. 

How can you have love without emotional feeling.  Love is an emotion.