I will admit it. When I'm in my group exercise classes, I often admire how fit everyone else in the class is. Some of these women just look awesome. And as I'm doing this surveying, I notice that almost no one's leggings are showing underwear lines. Not a single person. And I'm like, "How come my butt doesn't look like that?"

Could it be that EVERYONE is wearing a thong to the gym? How comfortable could that be? Or do they just have really great seamless underwear or... something else? Am I doing it wrong?