Imagine a world where Vivid Entertainment productions are more reality than fantasy. Casual and emotionless sex with gorgeous freaks would be had every five minutes. Alas, the real world is nothing like a porno movie, meaning sex often comes with many complications. Such is the frustrating case even when it’s given guidelines, like in the new romantic comedy No Strings Attached, opening this Friday. Ashton Kutcher and Natalie Portman (ironically starring in an Ashton Kutcher film after winning Best Actress at the Golden Globes) play two friends attempting to have a sexual relationship minus any emotional attachment. If their plan worked, No Strings Attached would seem ripe for a porno treatment, but the Ivan Reitman-directed flick is reality-based, and emotions flare. Still, the movie’s friends-with-benefits scenario reminded us of other bedroom deals stuck between consenting adults, which brings us to the following list of the 10 Most Memorable Sexual Arrangements in Movies. Don’t expect any AVN Award winners.