Offer to help, in exchange for information.

"It's your lucky day," I tell the naked girl. She scowls, clearly not believing me. "My name's Liane. I'm an adventurer from the big city, and I'm here to help you with your pixie problem. Tell me everything you know."

"Right now? While I'm like this?"

"Don't worry. I'll help you get back to town with your dignity intact. But first I need to know what I'm up against. They could strike again at any time."

"I'm just a shepherdess! All I know about pixies is they love pranks, and they're mean, and they're perverts."

"There must be something more. What kind of pranks do they play? Sexy ones?"

"Only if you think it's sexy to strip a farmer's daughter naked and bind her into a sack full of itchy straw. Or tie a stable-boy to a pole in the barn with nothing on but a pair of lacy panties, and let him be discovered by the milkmaids. Or tie a milkmaid down over a stile with her skirts lifted and her bottom bare, and a switch left beside her for any passer-by to use as he will. Is that what you think is sexy in the big city?"

"Well, maybe a little. Could you take me to this brook where you fell asleep?"

"I don't see why I should."

"If you don't, I'll leave you here naked, and you'll have to walk all the way home without any clothes on."

"Okay! Okay! You win!" Reluctantly, the shepherdess stands up. Acutely conscious of her nudity, she folds her arms across her body, doing her best to conceal her ample breasts and the tender thatch of golden curls. Seeing me ogle her naked form, she blushes and lowers her eyes. When she turns away I'm given the chance to scrutinise her heart-shaped, peachlike buttocks, pretty and rounded and entirely unprotected from my gaze.

I should resist the impulse, but I can't. She squeals as I land a stinging slap on her ass.

"Eek!"

"Nice ass, nude girl."

"I hate you! Shut up shut up shut up!"

"Let's go. The quicker you walk, the quicker all this is over."