Off the top of my (larger) head, here are some of my favorites

Your pussy is so wet.
Your pussy feels so good.
Are you a good girl?
You're my little slut.
You're making my cock so hard.
Cum for me.
Spread your legs and tell me about your day
Wait... did you work at subway? 'Cause you're giving me a footlong!

Ideas and improvements welcome!

and we'll talk about the first thing that pops up.

or....

If I told you that you have a nice body, would you hold it against me?

you pay for sex.  When was the last time you picked up a girl in a club or bar?  I agree that these are about as stale as they come.  You DO need some new material.

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LoL. Yup yup.  

And ask her if I was dying of thirst,

I'm telling you guys, I  am pretty sure I would have made one hell of a cocksmith!  I'm entirely convinced of it..  

And if given the chance in another life.. when I would decide to break some biddies off real proper like (paid or not)  
I would undoubtedly say things like..
"You like when daddy's deep inside you?"
"Do you get this wet for all your dates?!"  
"You feel so hot inside" "Look it's dripping it needs it"
"You're pussy is milking me it's so creamy and tight"
"Clench that pussy tight for me..that's right. Now tighter, make this hard dick cum!"
"I'm going to bring you right to the edge and pull back just so you can beg for my cock." "You like begging for this hard prick?!?"
"Make yourself cum for me like you do when you're all alone"  
 
Or how about..  " Don't feel guilty giirrl, everybody deserves some level of job satisfaction." Hope this helps

Heck it was your idea.

It's one-liners during sex.  

The game never ends, admittedly, and you don't want to scare them away. But the environment is a little different after you've already got them in the room.

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pick-up lines, but they still have to be lines that aren't lame.  Women are women.  They still like confident guys who have a little game, even when you're paying.  Blurting out something corny just because you're already in the room doesn't help your image.  Just sayin.  

Dear Mr. Lion:

I think you know this, but like shit and Shinola, activity and productivity, building initial rapport and pillow talk are rather separate.

Whether it's me saying it or her.

It's even worse than I thought.  My sympathies. I will try to be more understanding now that I know.

and if we create a new division of the SPOTY's for "lamest poster" I am certain he would be one of the instant frontrunners.

and yes, he deserves our sympathies. The guy is about as lame as they come.

I disagree about being more understanding however, some people come on here just begging to be ridiculed, who am I too refuse? lol

The lines almost don't matter ..... it is all in the delivery.  If you are confident and your delivery is great, it is over.  But if you look like you don't know what you are doing or sound awkward, you probably look like a schmuck.  

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You're not sticking that thing in me ... lol
Last time I tried to fuck my ex wife