Writing
Will Gluck stated that the concept of the story began with the idea that he wanted to work with Kunis and Timberlake, explaining that he rewrote the script for the two actors. Following those changes, Gluck expressed that he wanted to attract a more adult audience and that he "wanted to do more of an adult movie about sex, too, and about relationships".[20] He went on to compare the storyline of Friends with Benefits to the relationship in films between Katharine Hepburn and Spencer Tracy.
Read more: https://en.wikipedia.org/wiki/....Friends_with_Benefit