That is totally disgusting! I always wash my clothes before I wear them even if they're packaged. It makes me wary to buy anything off the rack like that, even if I do wash it, it's so gross. It's gross that people would wear them and return them, what are they thinking.
I used to work at JCPenney and found a couple pairs of thongs inside out in the fitting rooms. I gave them to my manager and I'm not sure what she did with them. I hope she didn't put them back out to sell.
True love is like a ghost which many talk about but few have ever seen.