The visual effect of pulling your underwear up so high that either testicle hangs out its respective leg hole.
Brian and Jaymz had no fucking idea what to do with pale pink lacey g-strings, both of them being professional virgins. Jaymz put them on his head, crotch over his mouth and poked out his tongue, doing his best impression of a spitting viper. Brian put them on in the right place, but his balls were hanging out either side. "Look!" he exclaimed with glee, "I'm a blowfly!"