[description: series of selfies in a sheer, pink, glittering miniskirt - and nothing else]
I actually wore this outfit on a quick run to the gas station - just as you see it: no shirt, no shoes, just skirt and purse. I didn't go in the gas station, of course; I just waited in the car. But it was still fun.
Although rationally, it's good to be prepared for contingencies (i.e., have something on hand with which to cover up), there's something thrilling about not having that safety net - the thought that, if something were to come up, you couldn't cover yourself even if you wanted to, and therefore you'd be forced into novel situations you wouldn't dare enter without a crutch, if you had the chance to make a reasoned choice. Situations with a likelihood of undesirable consequences that nevertheless seem like they'd be exciting in your fantasies, where everything works out to your benefit.
I don't know why there should be such a disconnect between the idea and the reality - that walking into a gas station naked should seem like it would be a good time, when in reality it would likely result in a stressful confrontation or worse. Perhaps that's why this sort of sexual psychology is considered an abnormality. The ideal scenario, I think, would be one in which I was aware of any and all potential onlookers, and able to evade each and every one, sneaking in and out of dangerous situations with the potential of being caught, but having the heightened sensory awareness to avoid detection (a scenario that our modern security camera-fixated society renders pretty much impossible).
Perhaps this sort of scenario is effective because it maximizes the thrill of being naked where you shouldn't, while ensuring that the negative outcome (getting caught) is never actualized. That's what I think makes this sort of activity so exciting - the constant reminder that you are only one small step from being exposed, without having to leave what minimal comfort zone you've maintained for yourself. More potent than couch surfing naked, but less dangerous than actually walking into a store. Like balancing on a razor wire - you get all the thrill of heights, without [one hopes] actually falling. But the excitement wouldn't be nearly as strong if there were not an actual drop below you.