I've just seen your movie.
Rob: Did you like it?
It's really crazy.
Rob: It's pretty weird. It's pretty out there.
It's definitely no teenage movie.
Rob: Yeah no. Unless you are a really clever teenager or really interested in big limousines.
In the movie there are many nude scenes. You have much sex with many different women. How was that?
Rob: It's strange. Half of the sex scenes were not planned to be sex scenes. They should take place after the sex. The script said: "They just had sex", but David said on the day: "You have sex now". All my preparations, all the work and the huge dialogue scenes that I've thought about, I could throw away.
Has you girlfriend Kristen seen the movie?
Rob: Yeah, yeah.
How did you prepare her for all these scenes with all these different women?
Rob: The only problem is, when the movie isn't good. And then there is the question: "Why are you doing this? Why are you playing so many sex scenes in such a bad movie? If it's interesting and believable, then everything is okay."
When did you decide to make your relationship official?
Rob: To be honest I don't talk about my relationship. Simply because I never do. Since I started doing interviews. No... simply no.
source | Thanks to @Kris1787 for heads up and uploading it for non German viewers