Considering the ad copy reads, in part " …these gymnasts are busting their young asses to yaddawhatever" I think it’s a joke. Looks like something off Photoshop Phriday over at FARK, and a quick Google doesn’t reveal anything.
OH my G-D a picture of little girls doing gymnastics.
So someone used photoshop to make a rude joke, still if anyone sees them as in anyway sexual they have a seriously sick mind.