Actor John C. Reilly dreads filming sex scenes - because he worries he will become aroused by his female co-stars.

The Step Brothers star insists his body responds favorably while he is in bed with an actress, despite the many distractions on set.

He says, "It's always really uncomfortable to have to swap spit with someone and rub bodies. People (actors) always say, 'In a lovemaking scene, sex is the furthest thing from your mind because you're worried about the crew and lighting'. Bulls**t! If you lie naked against someone of the opposite sex, things happen. The plumbing department doesn't always get in touch with the brain. It just happens!"

"You're simulating sex so your body is very confused."

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(This news article provided by World Entertainment News Network)