Paradise in Service is reportedly Ethan Ruan's most daring performance in his acting career.
According to an article in Asian Pop News, the Taiwanese actor and his co-star, Regina Wan, will be stripped almost naked while filming an intense sexual scene.
In the film, Ethan plays a soldier who lost his virginity to Regina who acts as a camp prostitute.
To prepare for the scene, he reportedly padded extra protection in his pants in advance.
Despite that, Ethan said he had a "natural reaction" when Regina slipped her hands inside his pants during the scene.
An embarassed Ethan said: "It's a bit hard to resist that. My body had some reaction."
Ethan also admitted that he felt slightly unhappy whenever he saw his girlfriend, Tiffany Hsu, acting out intimate scenes on TV.
Therefore, he does not plan to share his experience with Tiffany this time round.