Before you could make any sudden moves, the world rumbled around you—you saw the Snorlax's arms raise, and she let out a massive yawn rivalling her earlier snores as she sat up, nearly toppling you off her belly before you grabbed her fur in time. "Yawwwwph... Man, that was a good nap," she said to herself, one hand reaching back to scratch at her ass. "I better clean this all up... Hm? Oh my, who's that tickling me?"
Someone tickling—...Oh dear. She's more sensitive than you expected, and she's already spotted you. "Uh... h-hi... ^Whoop!"
"Hello there, little guy," she says, as she plucks you off her fur and lifts you up, giving you a better view of her face and cleavage—letting you see, among other things, a ponytail draping down to her shoulder and a warm-yet-sassy grin on her face. "I'm surprised there's a human like you all the way out here, rather than out in your tiny little city—you must be eager to meet me, aren't you~?"

"I-I suppose so, y-you are beautifu—wait, tiny little city?" That can't be right, you might be tiny but surely people here were—
"Yep! There's a city a little ways north of here, most of the skyscrapers don't reach past my ankles but the humans living there are adorable!"
—...Oh. So you didn't manage to shrink yourself, but you did end up somewhere where humans were shrunk compared to wildlife back home. Part of you was scared at how the people and sexy Pokegiantesses might interact...
"Oh, it's so cute how you little guys mimic our own cities."
...But, if this Snorlax gal was anything to go by, you had high hopes. "Y-yeah, I suppose so... M-my name is [Y/N], and I'm a traveller."
"Ah, a wandering human! You can call me Sammy, and I'm a... well, a few things, but mainly a connoisseur."
"That would explain the food," you noted with light snark in your voice as you looked at the cores, peels, wrappers and cans around. "Where'd you even get this stuff?"
"Oh, I guess you don't have much experience with Pokemon civilizations, huh? I got these from the market in my hometown. I think the Salamence running the place has a crush on me... Or it might be because I spend so much money there~"

That got a laugh out of the both of you. "Ah, gee... Y-you don't eat humans though, do you?" you asked, wary of how widespread a Snorlax's diet could be according to most media.
"Yep."
"Oh thank goodn—wait, what?"
You hoped Sammy would say she was just joking, but she gave a chuckle that seemed more an attempt at comfort. "Ahaha, don't worry, you're not gonna be eaten if you don't wanna be eaten! But I have eaten a lot of people over the years, mostly the normal way."
"...A-and they come out fine?"
"Yep! Let me tell you, it feels super good having them pop out your ass. Some have even come back to tour my guts again!"
"W-wow..." You gazed down at her massive, BBW figure, picturing yourself inside it. "A-are others like you, Sammy?"
"A good bunch of us!" she answered. "My girlfriend, this sexy Purugly Pauline, lets humans relax beneath her paw pads while out and about. And my workout partner, a hunky Hariyama named Harley, she puts them into the mawashis she wears so they soak up her lovely sweat! ...You okay? You're redder than a Tamato berry."
"I-I'm fine," you answer, shaking yourself to try and clear out the sexy images Sammy had put into your mind. "S-so, you'd eat me if I wanted to be?"
"Yep. Or put you back on my bod instead. Can't blame you, I'd let anyone from a Goodra to a Joltik enjoy the work I've put into these curves if they're polite enough~"
_"Eheh..." You felt your blush return, and soon your thoughts crystalized on where you wanted Sammy to put you...