How to become a whore, and what the finer points of remaining a good whore are is the focus of Whores, Inc., in which a gaggle of lovelies do whatever they can to be considered a dirty, slutty whore.
For example, Mandy Bright is ball-gagged and paddled, while three men take advantage of her, writing all over her body and then plugging her with a giant butt plug, before she chokes down their cocks and fucks them all in turn, being held aloft by two of her suitors while the third fucks her half to death.
The best scene, though, features Olivia O'Lovely, hot as always, who pledges to take a giant cock in her ass and comes through, but not before slurping on that very same cock for a little while, just to get it nice and hard, and getting her juicy cunt fingered. This girl grunts like an animal when she fucks, which is a sound that can actually reach into your ball sack and draw the cum from it.
Honorable mention goes to blue-eyed Diamond, who gives the kind of blowjob that can only be compared to a bull ride, in that you'd be lucky to last more than eight seconds in either case. It's not the hottest thing you'll ever see, but you'll have a good time. And these are whores you don't have to pay for.