Don't try and just throw the two hottest girls you can find together. Most girls that work together have chemistry, and operate with the same set of rules, like they will both BBBJ, DFK, CIM, etc. If you are into seeing the girls doing each other (like most of us are), ask if they are into each other. Most of the time one of the girls will be your point of contact, and it always helps if this is a girl that you have seen before, so all the screening is done and there is already somewhat of a familiarity between you.
Condom changes during the session are a drag and can kind of mess with the momentum, but, girls who know each other generally know how to make the changes relatively seemless. I would book as much time as possible too, so your are not in a huge rush to live out all the fantasies and positions, etc.
NSF
I'm not new to the hobby but have never had the pleasure of 2 ladies at the same time.What should I expect and what do they do ??
A 2 girl experience almost always includes a session of them taking turn blowing you, or even better one giving you a BJ, while the other licks your balls.
The variance is determined by if this is a tag team session, or fully interactive.
Are these ladies bi, and comfortable working with each other? If so, you can expect to see one eating the other while you pleasure her. If not, the ultimate you can hope for is one pussy in your mouth, and another on your cock.
Either way, it is a hot time!
Don't try and just throw the two hottest girls you can find together. Most girls that work together have chemistry, and operate with the same set of rules, like they will both BBBJ, DFK, CIM, etc. If you are into seeing the girls doing each other (like most of us are), ask if they are into each other. Most of the time one of the girls will be your point of contact, and it always helps if this is a girl that you have seen before, so all the screening is done and there is already somewhat of a familiarity between you.
Condom changes during the session are a drag and can kind of mess with the momentum, but, girls who know each other generally know how to make the changes relatively seemless. I would book as much time as possible too, so your are not in a huge rush to live out all the fantasies and positions, etc.
NSF
And one of the absolute best reasons on earth to use female condoms - when doing a threesome. No muss, no fuss, no waiting... 
I agree with the statement to choose providers that work together.
My Double's Partner is also my best friend and I adore her... so besides enjoying her company, I also enjoy playing with her. (*She is also my PIC- Partner in Crime*)
The juicy details will also give you an idea of what to expect.... kisses ~Tori
