How many times have you found an ad for a girl you don't think you've seen, contacted the girl, and made an appointment just to discover that you have seen her before. It has happened to me at least four times that I can think of. Different or fake pics and new names have been the contributing factors.

Once I actually didn't realize it until the disappointing session was over. Another time I went through with the session and had fun again. Once I walked away because of fake pics and I remembered she was a total rip-off. She didn't say a word as I left.