I know when ur first falling in love or even if it's just a deep sexual attraction, the kissing is a major factor. The Fifty Shades of Grey, it seemed they pecked & when ur becoming lovers, ur definitely don't just do that. Not that their tongues should be all over the place but, the kissing seemed kind of closed off. Maybe that was intentional for the movie but the book painted a veet different picrure w/ their kissing.And I think the most vital part of Darker is where he places his hand w/ hers on his heart. & definitely when she gets to touch him.