The first set's zip is called "street racing", so maybe the nude is there to start the race. The very first picture in post #2 has what may be a tattoo on her back, but also may be merely grease.
The second set has what looks like Cyrillic letters, so she is probably Russian or Ukranian. Another example of "The Russian Way of Life", with nudity appearing at, to American eyes, bizarre times. The way she holds up the glassware, maybe she is trying to increase sales. Definitely a cute girl with a sweet smile and a sexy body.