I think this is loosely based on David Lynch's casting for the role of Sandy in Blue Velvet, which Laura Dern got. And now I can see why she got the part, I would have cast her too, she's very talented.
She might have sucked her first one a block away and 2 more between that first one and this one. In a small town the slutty girl might never be farther than a mile away from the farthest away dick she has sucked. It's like a paper route in a way.