I don't know what Gloria did before joining Xiaoping, but I am guessing she does well compared to other civilian jobs. Is she does 5 massages a day for an hr, with no extras and doesn't get any tips, she would make $250 a day or $1250 for 5 days. Tax free. That's $62, 500 a year. That means it's like making $100,000 a year befor tax.
She is smart. Why give extras if you aren't comfortable doing it with us old, over weight bastards.
I am surprised we don' run into more ladies not offering extras.
Now I know not every lady is busy as per my example, but if the place is busy, they could make a lot more as they see fit.