Saw an interesting discussion on Twitter the other day. Basically, a pair of providers were discussing how chemistry determines what happens in a session. The gist was that chemistry is 50% the attitude and charisma the guy brings to the session... and that services will naturally differ quite a bit, with some guys getting full GFE and others not.  

by some providers, and my own experience.  One example I’ve experienced is BBBJ instead of the by-the-menu CBJ.  Another is, with squirters, if a guy pushes her to squirt without helping her get in the mood for it, he gets pee instead.  As for kissing, perhaps the type/quality of the kissing is different.

There are some providers who can find "something" to like/be attracted to in virtually every guy they see. I don't honestly know how they do it with some of the guys I have met at M&Gs over the years and I suppose that is why they get universally good scores.  

But maybe the chemistry makes the heat more likely. If a woman likes you, trusts you, "connects" with you, I think it is much more likely you will get those things you and I both desire. Of course there are some hard limits for ladies but sometimes the stated hard limits may differ if there is that chemistry which can lead to lust.  
A few years ago, I met with a girl who would not do CIM. She said she just doesn't do that. No problem, it wasn't necessary for me. We met again, we were in 69, and she..well....changed her stance on the issue. lol. I was rather surprised but very happy about it. So call it chemistry, or trust, or just the proverbial "connection" but we are all human and sometimes we make decisions in the heat of the moment, that we might not make when calm, and sometimes we change what we do physically out of feelings of trust or compatibility or just wanting to please a lover. We are not automatons. And thank goodness for that.

Seems like a no-brainer to me - just logical.  Careful vetting by the hobbyist I think lessens the chance of winding up with a  mechanical robot.  Every time I see a new provider, I try to go out of my way to be a gentleman and compliment her.  For me, I've found an opener that works is something like "WOW - your photos don't really do you justice.  You're even better looking in person".  I know that probably sounds corny but for me, it is always well received.

Chemistry: Theory and Practice

I also think being eminently datable certainly doesn’t hurt lol.

All women are a bit insecure, but I've heard that truly stunningly beautiful women hear compliments all the time so it doesn't mean much to them.  Whereas the plainer the girl is, the more she appreciates being appreciated.

Salesmanship. It’s a deliberate effort to build rapport and develop trust. Not every provider is good at it, just like not everyone is good at selling. You also have clients who just aren’t able to do their part of the equation.

+1 took my words lol

When I started 20 years ago it was a hustle, but now I have to have a connection it's not all about money.

Lust - or heat - happens when you see photos or videos or are meet by a beautiful woman whom is wearing an outfit that hits the lizard part of your brain. You want to get on your knees and eat her pussy as soon as the door is closed.

Women receive a lot of compliments on the daily- the trick is to compliment them in ways they don't usually hear!

I was with a hooker over 10 years ago who understood the game. We were joking about "chemistry" and she said "How much chemistry do I need to fuck a guys brains out for an hour?" My kind of hooker!

"Chemistry" and service. Good Chemistry is Dial soap, little to no cologne, brushed AND flossed, PLUS mouth wash, no scum on tongue, and just squeaky clean. "Chemistry" meets "body" and clean shaven, well groomed.  THAT is. "chemistry". One would eat off a floor if clean enough.

You want a good session?  Follow good "Chemistry"

I see a gal whose services are just plain vanilla, and she's at best a gal next door type looks wise, but when I with her, gadzooks, I can't get enough of her.  She seems to feel the same about me as well.

just because a TER review/profile said she dis with someone else?
If she advertises that she loves all types and sizes, etc... then I'd be more disappointed than with a provider who doesn't have a menu published on her web page. In the case of the latter, I go in knowing YMMV and I better give a great DATY if she's hesitant being intimate.