what does this mean? thanks

industry and generally refers to the fuel efficiency standards of various automobiles.  

For instance, a motor vehicle may advertise that it will get 32 miles per gallon on the highway, and then there is a little disclaimer at the end that says "your mileage may vary" (YYMV).

I've never been able to figure out why guys are always talking about fuel efficiency when they are discussing a session with a girl.  I've just always figured it's that guys always like to talk about their cars more than girls anyway.

That's why we talk about gals having high or low milage, high or low maintenance, nice bodies, nice accessories, being easy to handle, etc.

Then, at one time at least, if not still true, most guys and gals had their first sexual intercourse in:  a car!

So why not YMMV?

(Specifically, this means that depending upon how the provider thinks about you, you might get certain things, Greek most commonly, that others may not get.)