No, really...its not underwear!!

I found a great pair of shorts at Marshalls. Couple inches above the knee, small houndstooth pattern in black and light blue on a white background. I guess they're meant to be swimwear but when they get wet...well, James and the Giant Peaches become quite...noticeable, so they're shorts for good. Anyways, ran to a gas station with my cousin, friend, and fiance. We went in, shopped around for munchies, then the cashier apparently decided playing body police was necessary. She tells me how "innapropriate" it was to be "palling around town" in just underwear. I guess they could look a little boxer-ish, with the length and pattern, but boxers generally don't have zippers and belt loops. After some back and forth with her, pointing out the zipper, belt, and pulling my boxers down below the leg, she flat out refused to ring me up. "We reserve the right to refuse business" was her official answer, also chimed in that she never serves guys or girls when they are "nearly naked"...We are in South fucking Florida here, I can't believe there have never been shorts shorter than mine. And where would she stand on pajama pants?? I left without making a thing out of it, everyone else chose to make their purchases elsewhere and left with me and we went to a different place down the street with no issue at all. I think I'll visit tomorrow and speak to a manager though.