The provider or the client?

The clients should act like they show more interest in the provider, and the providers should act like they show more interest in the client.   This may just be the definition of one heck of a session.

It'd be ideal if there was genuine interest, free of any 'acting'.

what the Other One Has
MORE?

You don't really think hookers are seeing you without "acting", do you?

i·de·al·ist
īˈdē(ə)ləst/
noun
1.   a person who is guided more by ideals than by practical considerations.
synonyms:            utopian, visionary, wishful thinker, pipe-dreamer, fantasist,  
                            romantic, dreamer, daydreamer, stargazer;

the Expectations of a hired girl  
  are Wide and Varied.

Peoples' interests vary with all kinds of situations, and to try and quantify things and make a judgement about them has no meaningful purpose.

I think the provider and client should show mutual interest in each other, that makes for a better more exciting date of intimacy and fun.

screened out. I totally understand providers don't always get physically excited about seeing clients because of whatever but screening out mr miserable should be able to be accomplished by getting references from fellow providers.

More than once I've ended a session wondering what is going on outside the room.  If the world had ended in nuclear war I would not have noticed while I was busy with my provider.

interest on my bonds.  If you know how to develop a provider's interest, then you will always get it.  I love it when they start feeling me up down below through my pants and let out a little gasp when they feel how THICK my wallet is, and I haven't even taken it out yet!  Instant interest every time.

If you want genuine interest get a genuine girlfriend. You're asking too much for what you're willing to give.  

Who can objectively tell? Only thing undeniable is both their needs brought them in the same room together so they should both recognize the humanity in one another despite the odd circumstances and try to treat each other the way they'd want to be treated if things had played out differently and they'd somehow ended up on the other side of the equation.  

TER should start letting guys post photos of their wallets in the photos area...a nice thick bulge can really turn some of the girls on.  

No one ever thinks of the interest shown by the provider to get the costumer to buy their product.

that's what I'm paying for.