Picking my kid up from daycare the other day, another mother was getting her kids' stuff ready when I walked in. She was quite aware that I could see down her top because she did everything she could to correct her position so that I couldn't see anything.
A few moments later, though, she was so frustrated with her kids not helping, that she just gave in and didn't care what I got to see--lesser of two evils, I guess.
Her bra was way too big and I saw nipples and everything. I saw up her skirt a bit, too, but it wasn't too exciting. I think she thought I would look away, but it was too fascinating to turn around. Another parent caught me looking and shot me a look of disgust, but whatever...