It’s the battle of the casual sex trailers! On Friday we posted the first promo for No Strings Attached, which stars Natalie Portman and Ashton Kutcher as friends who decide to add emotionless sex to the mix, but find it tougher to stay detached than they expected. At the time we mentioned it had competition in the form of Friends With Benefits, which has basically the same premise but with Justin Timberlake and Mila Kunis as the shag happy mates. Now a red band trailer for that movie has arrived, although if you’re hoping that means it’s full of nudity, you’ll be disappointed, as there’s just a bit of rolling around in bed and Mila Kunis saying ‘fuck’. However it does potentially look more fun than No Strings Attached, even if it will be handicapped by coming out next July, several months after the Kutcher and Portman flick.