A glance cast his way is all that is needed for Taiwanese heart-throb Ethan Juan to respond accordingly.
There is a tender romance in the Taiwanese military drama Paradise In Service - but it is probably one that moviegoers are not expecting. Leading man Juan, 31, tells Life! that making a film with director Doze Niu is like "falling in love".
Here on Monday to promote the film, which opens in local cinemas next Thursday, he plays the lead role of Pao, a soldier assigned to Unit 831, a euphemism for a military brothel.
After having worked together on the television series Wayward Kenting (2007), as well as on the films gangster drama Monga (2010) and romantic drama Love (2012), Juan and Niu know each other well enough that words are not even necessary.
Juan says: "He'll just give me a glance and I'll know what he's up to."
On the down side, familiarity breeds pressure. "He's seen my performances so I want to come up with something new and different and there's pressure in that."
Indeed, from the macho and tragic Monk in Monga to the shyly stuttering Kuan in Love to the naive Pao in the new film, Juan under Niu's direction has shown that he is more than a pretty face.
Still, their relationship may need a cooling-off period.
Juan says with a laugh that he had asked Niu in jest: "Should we take a break after this?"
Not to worry, though, they are clearly committed for the long haul as they have set up an artist management company, Tian Liang Yu Le (Tian Liang Entertainment), in March last year, together with film-maker Lee Lieh.
Juan is probably looking to tap Niu's knowledge and experience. In the case of Paradise In Service, he was shocked when the director first broached the topic of a military brothel.
He says: "Taiwanese people are aware that Japan had comfort women, but I never thought that in our own land, there would be this unbearably tragic chapter. Yet, not a single word of this is breathed in the history that we study. This has been forgotten."
The film is set on the island of Kinmen from 1969 to 1972 and is also about the soldiers who had to flee China in the wake of the civil war and whose hearts always yearned for a home they could no longer return to.
This struck a chord in Juan as it was his grandfather's story. It was partly why he took up the role: "I've heard him talk about it and seen so many old photographs.
I wanted to narrow the distance between us and, through this film, better understand what he's thinking."
Like the soldiers in the film, Juan's grandfather also longed to return to China. It was a feeling Juan could not understand in the past.
He would say to the elder man: "I'm born in Taiwan and you've been in Taiwan for so many years, so why do you feel that way?"
After making the film, he realised why, saying: "It was the hope and pain of their lives. For us, returning home is a simple matter, but for them, it's a lifetime of waiting."
As for Unit 831, his grandfather said he knew about it, but never went there.
In the film, Juan's character is fully immersed in that world. Pao forms a tentative friendship with one of the women, Nini (Regina Wan Qian), and gradually learns about their stories.
To film an intimate scene, which is perhaps inevitable given the premise of the film, Juan says nonchalantly about how he protected his modesty: "Well, what needed to be done was done.
The key areas were well-protected and the rest was up to the director.
"There was a scene of soldiers showering and naturally, everyone was naked. You can't take any precautionary measures at all so things get revealed.
So by the time I got to the sex scene, I was actually quite used to the nudity. What I was embarrassed about was the fact that the scene involved someone else, a woman."
The embarrassment he confesses to feeling is surprising, since he should be no stranger to sexy shoots as an actormodel.
Moreover, it is not like his long-time girlfriend Tiffany Hsu, 30, is not familiar with such scenes occasionally required in his line of work - she acts and models too.
He says: "Basically, she doesn't say much about it because it's our job. As long as it's reasonable and serves the role and script, then we can both accept it."
He is honest enough to add, though: "Of course, if she sees that, I would feel awkward, but that's about it."