The secret behind a good hug

I was walking down the street with a friend today and I saw a man with a "Free Hugs" sign and so naturally I hugged him, because it's what I do. After I hugged him he said that the secret to a good hug is to hug someone in a way so that your heart is closest to theirs. He said that people feel more of a connection that way. I don't know if it's the true but it is a nice thought. I like to think good hugs do come from the heart.