Some mama’s don’t like girls to be called directly while at work, or when arriving my favorite was busy, either I settled or walked. WeChat filled the void when visiting a busy shop, I'd notify my shop favorite of my desire to visit, she would wave me in , wait outside and tell me when to come in. when she was next up, this way Mamasan didn’t suspect our pre planning. It didn’t always work out, mostly did though. It also gave me an opportunity to message a different girl other than shop favorite at a different shop, she would agree to a session and tell me when original favorite was busy, hence the opportunity to sample someone else. It has some advantages IMO.