Those who wish they were the "special punter" to their regulars are those who probably saw something inside that person and wanted to show her how special she is to him.
If they were only interested in sex they wouldn't even bother having a regular - just rotate girls every now and then. I think the problem is that many girls just don't appreciate their regular customers and think that they can manipulate the hell out of them.
I know what my choices are, but I reckon not many guys can follow my example, nor many girls in the industry can follow my advice on how to treat a man properly if they want to quit the industry and start settling down.
Like in one of my life story told recently, I dodged a bullet coming from a Thai girl who was after me for 10 years. I could've "saved" her from getting pregnant and living a life of hell but she took me for granted. She got what she signed herself up for - the karma for taking someone for granted.
Lesson to learn here is to not take anything or anyone for granted. Do not listen to friend's advice on over-testing your potential partner, grab him/her immediately as the opportunity will never come around twice.
With my crush, she's different. 3 years and the opportunity came around twice, I didn't hesitate on my second chance with her. I just hope she also feels the same.