Familiar or fun.
That is when local celebrities say they will put their arms over fans' shoulders or give them a hug while taking photos with them.
Popular TV actor Elvin Ng says there is a difference between supporters, who have been following his career for a long time, and the random person who comes up to take a photo with him.
For the latter, he would just stand next to them and smile.
"I put my arm on their shoulders only if they are familiar and I have seen them a few times before, or if they are children or the elderly," says Ng, who is in You Can Be An Angel Too, the 9pm serial on Channel 8.
Former 987FM DJ Divian Nair says he usually does the "index finger point" to the person standing next to him.
"It puts the focus of the photo on the other person, which is what I am assuming they want," says Nair, who was last seen in Channel 5 serial Mata Mata: A New Era.
But on occasions, when people are friendlier and lean in close or put an arm around him, he returns the favour.
"I try to do it in as brotherly a way as possible, so nobody gets any wrong ideas," he says.
A group of Muslim girls in Malaysia were threatened with arrest after a video, showing them hugging members of K-pop boy band B1A4 earlier this month, went viral.