The golden age of thongs definitely seems to be past us. I'm gonna say it was from about 2000 to 2010-12 at the latest? I had certainly seen thongs before that, but I think they became really popular then, coupled with the popularity of hiphugger jeans and pants. Plus Britney Spears and others started showing them off on purpose. Glorious times, I was in college in the early 2000s, they were everywhere. High rise pants for women seem to be the thing these days, so even if they are wearing thongs, a peek is pretty rare.
Honestly, the last really good accidental whale taol Ibsaw was almost 10 years ago. My boss Ashley was a cute 20-something recent college grad. I was sitting at a bank of computer screens in our factory control room, and she came over to ask a few questions of the operator next to me. She backed up to bend over at the counter to take some notes while talking to him. I got a close up view of a dark green cotton Victoria's Secret V-string prominently rising above the waistband of her jeans.