I try to translate a little bit
At first he said that he was 16 at the casting and that they had to wait until age of 18 to make the sex-scenes so he was then an "adult" like it's written down the lawbooks.
He was very exicited to make such scenes especial with kate.
He lerned a lot form her.How she manged to get into a scene. How she practise, how she asked questions and how she challenges the scenes and dialogues and how she works as a person.
Then he says that she has an funny british humor and that it was a great fun to work with her.
The next sex-scene will be still a challenge as they are allways a challenge and as an actor he would say that he doesn't experienced everything yet.
About the production:
The whole(especial the length of) preparation time was new to him because it was his 3rd film and he didn't know much about the business and he lernead a lot of things by making this film. It was a great luck to work with all this ppl.
Everthing in the movie was arranged perfectly and every moment is thought trough from camera to dresses to setting and everybody was great and proffesional. He noticed that from the beginning.
-----
That is something close to a one to one translation. So maybe it's not totaly pefect and the correct translation because my english isn't that good.
But i hope it will help you a little bit