Jamie Dornan is a man. Thus, if he has to take the underwear off of a women before they have sex, it is not going to be done in a way that women will find sexy. He will just rip them off and go for it. But in the Fifty Shades movies, a man can not do that. Therefore, Dakota Johnson showed him how to do it properly and a way that will turn women on. How? He told Conan O’Brien that you wrap your thumbs around the top and slowly pull them down one side at a time.
Did he get a thumbs up from his co-star for his thumbs down? He did not say, but you saw that movie, what do you think?