The original is basically the same as this meme but more condensed.

The woman is able to flag down several vehicles not because the distress of a fellow human being roused the (presumably) men piloting the vehicles to help her, but because they are enticed by the implicit suggestion that her mere presence (or rather, the mere presence of a prototypical "slut," i.e., a promiscuous/sexually indiscriminate woman) may mean that they get to have sex with her.

It's demonstrating sexual objectification of women in a humourous way.