i cant imagine any top tier lady who would do BBFS at any price with someone on a first or even second visit ... and if she does .. that's a girl i would avoid covered or not.     and there is the old expression that any girl that will do BB with you ... will do it with anyone.      
   
 I have written before about guys (and girls) getting too complacent in the hobby ...  thats why a top Vegas agency and a bunch of top rated ladies recently had to quit the biz.        
   
 yes some BBFS exists mostly with long term regulars - i have had a few offer or just try it without even saying anything on a first or second visit, i stopped that  ...  those were girls i never called again.  
   
 this isnt dating ... nor is it exclusive relationships .. any guy that doesn't realize that the lady will have another 20 to 30 contacts that same month is fooling himself.  
   
 this is purely for fun, fantasy or simple release ..   the minute one loses perspective bad thing are guaranteed to happen.  
   
 STD Facts  
     The estimated number of people living with a sexually transmitted disease (STD) in the United States is over 65 million.  
     Every year, there are approximately 15 million new cases of sexually transmitted disease (STD).  
     About 66% of all sexually transmitted disease (STDs) occur in people 25 years of age or younger.  
     Hepatitis B is 100 times more infectious than HIV.  
     At least 1 in 4 Americans will contract a sexually transmitted disease (STD) at some point in their lives.  
   
Kudos, to you.  A very intelligent answer.  If I were sitting next to you I would buy you a drink.