One of the main reasons is that although still not viewed as a respectable career by many, porn isn't held in the same negative regard as it used to be. That and overall, just look at regular magazine covers, compare the babes of the 70's and 80's to the girls on the cover of maxim and fhm and so forth.
But why they are willing to do just about anything, you got me, maybe all girls are skanks deep down inside.
