Ok, so I've never actually spent 400 bones on a session but I have spent 300. Check out the first line of the juicy details in his review
"She knocked on the door and appeared to be in her early 40s. Appears to be a chain smoker, with a very thin and average body. "
Now looking at the girl's photo in the ad, she appears to be a knockout in the 18-25 year old range. Why he even let her in the door never the less plopped down the 400 is beyond me.  
I hate to say it but he deserved it.