"I'm wearing red bikini-cut panties. I can get away with that because this skirt doesn't show my panty-line. They're completely see-through on the back, so you can see every bit of my ass through it. They're cut a little bit high, so there's a little bit of my bare ass underneath the panties. And above that, the rest of my ass is covered by that super-thin see-through material. At the top, right at the base of my back, there's a little peek-a-boo window. For no real reason, it's just cute! And a cute little pink bow on top of it!" Your boxer briefs were being stretched as much as they ever had been - you were insanely turned on by this description!