Given the lack of context, I'll assume "Czech Streets - Petra" could refer to a segment or character within a series or a program that explores streets or culture in the Czech Republic, possibly named Petra.
The appeal is voyeuristic. Unlike glossy American productions, "Czech Streets" features real apartments, noisy traffic backgrounds, untidy bedrooms, and performers who often speak broken English or rely on a translator. The "plot" is always the same: The woman arrives for a non-nude shoot, is offered escalating sums of money (famous for the "Czech Crown" negotiation), and eventually agrees to explicit acts. Czech Streets - Petra