OK, I wear thongs all the time, not because they make me feel sexy, but because my butt is so big compared to my waistline and if the waistband of any underwear or bathing suit actually fits, the backsides' way to small and it's sooooooo uncomfortabel. But everyone calls me a "slut" bcause I always wear one to the beach even though I don't have permiscuous sex AT ALL.
If you feel they are the most comfortable, keep wearing them - As for the beach thongs are becoming more popular so it is a question of time before it becomes more socially acceptable. I have never really heard any of these thong wearers being called "Sluts" maybe adventurous or a sun worshipper.
there's nothing wrong wearing thongs if that's what your comfortable in, most people don't understand that you find them comfortable and you don't wear them to get attention. So no wearing thongs isn't trashy. You should feel comfortable in what you wear