For those that are new to the hobby the term YMMV means, "Your mileage may vary." To break this down further would be to say that everyone has preferences and that not everyone will receive the same services every time.
To allow this to make better sense to the hobbyist, I would further define it as saying that sometimes the chemistry is just NOT there.
In order to be sure you get the maximum experience during your time with a lady be sure to observe a few of the following:
1. BE CLEAN!! If you can run your hand down the crack of your ass and smell your ass on your hand, YOU ARE NOT CLEAN! You can bet I smell that too and that I will NOT stay in that region.
2. Follow the ladies rules. We do not have websites because we like to type, we have them to tell you how we do things.
3. Be on time. Not late, not early, ON TIME. By all means, ENJOY your time with us, but when time is up, it is up. If you would like to extend that time, there is nothing wrong with asking the lady in question if you may do so on a paid basis. Don't expect the lady to provide her time for free.
Follow the rules of common courtesy, be clean, be respectful and I think you will find that most ladies will go out of their way to ensure that you have a VERY good time with them.