We've already heard enough stars insisting that those sex scenes we find either major turn-ons (Mickey Rourke force-feeding Kim Basinger strawberries on the kitchen floor in 9 1/2 Weeks) or majorly eye-scarring (Heather Graham faking her way through grainy limo thrusts in Boogie Nights) are totally perfunctory while filming. With the massive crew surrounding them, the sudden lighting checks, and simple fact that they've gotta feign spontaneous heat take after take, we've leaned towards taking their word for it. And as it turns out, no matter how big the star or legendary their prowess in the bedroom, even simple kissing scenes with the most gorgeous A-listers around range from "awkward and sweaty" to "slightly icky and sort of wet." Where Tom Cruise, Angelina Jolie, Harrison Ford, Leonardo DiCaprio and more rank on the list of Worst On-Screen Kissers after the jump.

Harrison Ford, Outed by Helen Mirren: "She considered him 'the nicest, sweetest guy you could want to meet. But he can't kiss - he finds it impossible to kiss on screen.' Then, she added: 'He's probably not very good off screen either. It's not just me - other actresses agree. Whenever we get chatting off screen and we get around to talking, we come to the same conclusion.'"

Jason Segal, Outed by Alyson Hannigan: "Alyson refused to kiss him or do any romantic scenes with him, because he smelled like smoke. He thanks her for forcing him to do that because now he not only smells better, he feels better as well."

Orlando Bloom, Outed by Keira Knightley: "Keira Knightley claims Johnny Depp is a better kisser than Orlando Bloom...When quizzed on who she thought was the best kisser out of the two actors, she told InStyle magazine: 'Johnny Depp certainly wasn't bad.' Despite Orlando's gushing praise for Keira's kissing technique, he did admit he found it 'peculiar.'"

Steve Carell, Outed by Dwayne "The Rock" Johnson: "I just see Steve Carell's lips. 'So the bottom of a cat's paw - the soft supple part underneath - that's what Steve Carell's lips are like. But his tongue is like kitty cat litter. That's the physical experience.'"

Woody Allen, Outed by Helena Bonham Carter: "He tells you up front certain ways of kissing he does not want. No exchange of liquid is permitted. It can be a bit offensive because he makes no effort at all."

Angelina Jolie, Outed by James McAvoy: "I can tell you what it was like to kiss her on a film set: It was awkward, sweaty and not very nice."

Tom Cruise, Outed by Thandie Newton: "Kissing Tom Cruise was slightly icky and sort of wet. I'd really go home at the end of the day actually moaning about how hot it was and how many times we had to do it."

Victoria Beckham, Outed by Corey Haim: "She does this little grr gnaw thing that felt like a girl gnawing on your lip."

Sienna Miller, Outed by James Franco: "The British beauty's toothache made filming a nightmare. Franco admits filming the scene was far from enjoyable and had to be cut short when his co-star complained. He says, 'I think we kissed once in that film and it wasn't at all intense - there was no rolling around or anything. Sienna's molar was giving her pain so she called the dentist!'"

Leonardo DiCaprio, Outed by Virginie Ledoyen: "I think Leonardo is a nice guy. But I don't want him as a lover. There [was] no honest passion. No real sensitivity in our love scenes. In our underwater love scenes all I could think of was not drowning. I can't even remember his kiss."

[Photo credits: Getty, Wire Girl, Showbiz Spy, Renee Ashley Baker, NetGlimpse, Wireimage]

• JAMES MCAVOY: KISSING ANGELINA JOLIE WAS 'NOT VERY NICE' [ITW]

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