Is there a way I can stop my thong from riding up?

girls only please... I've tried 2 different sizes but they both seem to do that... like at first its ok but after a while I can feel the back strap laying up against my ass**** and have to pick it out. Is that normal to do that or is there any way to stop it from happening? And before people say stuff I didn't start wearing them to be sexy or anything just to stop VPL.

Thnx!
Is there a way I can stop my thong from riding up?
Post Opinion