I go to an AMP this afternoon and the woman and I have a good time (First time), ending in a BBBJ CIM.  She goes and cleans herself up and comes back and says to me out of the blue "You didn't sleep well last night."  Now, this is true, but I have no idea how she knows that, so I ask.  She points to my penis and says, "I could tell from going down on you."  Now, I know alot of ridiculous stuff gets said in the hobby, but does that make any sense at all?  

She was pulling your chain

http://en.wikipedia.org/wiki/Cold_reading
Cold reading is a set of techniques used by mentalists, psychics, fortune-tellers, and mediums, and hostesses.  
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And if you had said, "Actually, I slept great!" she could have said, "Perhaps you are well rested but you must have had strange dreams that you do not remember." or "Yes. that could also explain the nature of your erection and ejaculation."

Maybe  she is a cock whisperer. No doubt she has seen and spend more time with cocks that you do,so she might just happen to know what she taking about.  
Maybe she is an Asian  fortune teller.