I had bought a pair of yoga pants that were super comfy but had just a tad too much spandex in them... If they aren't more cotton than spandex, and you bend over ever so slightly your crack and whatever color thing you're wearing are totally exposed. I was standing in line for coffee and bent down to fix my pant leg that was tucked into my shoe, when I stood up the gent behind me leaned in and quietly told me my undergarments were showing through... He didn't say it in a father tone, he said it in a dirty old man tone so I turned back, winked and told him that's the point. I honestly had no idea those were like that, and had he said it loud enough for anyone else to hear I definitely would have called him out, but he didn't, so I figured I would make his day!