Some authors attempt to show friendship between the hero and heroine which grows into love.
Other authors show friendship growing out of the lust that is the basis for a loving relationship. The books that fall into this sub-category are those where the conflict to be resolved is outside of the hero and heroine's relationship. It is what brings them together. We also enjoy reading about friendships of our heroes and heroines with others. We also enjoy how friends can help each other through the bad times, and how a man who has found what true love can bring to his life can help another man realize what he is missing.