When you are mongering and the girl asks you, "So, what do you do? Where are you from?" and various other questions, do you ever lie and role play or do you always tell the truth?
I haven't mongered in Hong Kong much, as I have only been back there a few times. But I've never found myself telling the truth to any of the girls that I meet or that service me.
I've made up different stories, and received different reactions depending on what I tell them. It's pretty fun and it certainly seems harmless.
The last time I tried this, I told a girl that I was a comestic plastic surgeon. She couldn't stop asking what I could do to help improve her facial features.