Well the thing you have to remember is why did they get into porn in the first place? Well atleast one reason is they probably enjoy sex more so then the average person. And as I have found Bi girls are often so because of their sheer lust. Trust me I dated one
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Not that I am trying to say all bi girls are horny little bitches. But alot are. Plus they got paid a shizzle my nizzle amount of money. Which also helps.