>>936573003
Men are innately attracted to ass swaying behavior. It's a mating signal. If a girl is doing this for you, it will get you ready to mate with her right away.
Plus, the tiny panties she's wearing. Most sane parents make sure they buy full coverage panties for their girls and keep things like litte black thongs far away from their outfit selection.
So if you meet a girl her age donning one of these and flexing her ass at you, she wants it.