Why so many fake profiles?

As a newbie to this site it has struck me that many of the femail profiles are just simply fake. Can i prove this? No, of course not. But i am wise to the ways of the world and the Net for that matter. Porn is great don't get me wrong, it just spoils it for me in the dating section here to see so many obvious fakes. Not good for the genuine folk here methinks, shame really.
Still, this site IS brilliant for free porn vids so i ain't complaining.