What does it stand for?

You may have to page forward to find it.

YMMV = Your Mileage May Vary.

that what a provider does or doesn't do for you she may or may not do with others .....

I have seen it used in reviews more generically to mean your experience may vary, e.g., you may enjoy the experience with this provider more or less than I did.

IOW, your mileage may vary in the enjoyment level the lady provides - equating to "Your Mileage May Very" in the end.

Here we go again...click on the link for a list of abbreviations posted previously