Mila Kunis discusses her thoughts on the concept of Friends with Benefits in the August 2011 issue of GQ.
It's like communism—good in theory, in execution it fails. Friends of mine have done it, and it never ends well. Why do people put themselves through that torture?
Friends with benefits isn't a purely sexual relationship—it's two people who like each other having sex, not a random hookup.
And when two people who like each other have sex, eventually someone catches feelings and everything is fucked. You might be able to treat our relationship as killing time. I might not. I may be in love with you.
One could only hope, Mila. One can only hope.
Note: Mila is currently in Friends with Benefits due out next Friday. Ironically the film is similar to No Strings Attached which starred Natalie Portman, who Mila competed with for the role of the swan in the film Black Swan.