(Cover) - EN Showbiz - Mila Kunis has compared casual sexual relationships to communism.

The 27-year-old actress is the star of upcoming comedy Friends with Benefits, which tells the story of two pals, Jamie and Dylan, who realise adding a sexual element to their friendship will be tricky.

Mila portrays Jamie, while Justin Timberlake stars as Dylan, and the actress has been offering her own opinions on mixing friendship with lovemaking.

"I haven't, but I can give you my stance on it: it's like communism - good in theory, in execution it fails," she laughed when GQ asked if she has ever been in a casual relationship like Jamie.

"Friends of mine have done it, and it never ends well. Why do people put themselves through that torture?"

Mila was quick to point out that it is very rare for two people to have a sexual relationship without at least one of the parties involved developing strong feelings. She knows that as soon as one person develops emotions, the relationship will disintegrate.

"But friends with benefits isn't a purely sexual relationship - it's two people who like each other having sex, not a random hook-up. And when two people who like each other have sex, eventually someone catches feelings and everything is f**ked. You might be able to treat our relationship as killing time. I might not. I may be in love with you," she mused. (C) Cover Media