So you decide to do as instructed, and strip naked. The woman carefully coaxes her son onto her back, and starts slowly walking through the brush. You notice that she keeps trying to walk on all fours, making your progress increasingly slow.
Nevertheless, you follow her across the jungle, through thick vines, patchy thickets, and shallow streams until finally, you reach a large pit filled with tannish-brown liquid latex. Across the trunk of a tree above the pit is a message: "FOR MONKEYS ONLY. WE HOPE YOU ENJOY THIS EXPERIENCE COURTESY OF FANTASY FORESTS." The woman soon notices your obvious confusion.
"You don't know about the animals, you don't have a latex skin...you have no idea what this place really is, do you?"
You shake your head.
"This is the Jungle region of Fantasy Forests. You know, the big amusement park?"
You shake your head again.
"Wow, you really aren't from around here, huh? Look, here's all you need to know. This place has all kinds of pits like this that transform you into any kind of anthro animal you want. You want to be a big buff lion or a sexy snake woman? They can do that and more. And once you become an animal, you can do whatever the hell you want. Eat, shit, fuck, none of it matters once you shed your skin. Go on. Try it out."
She pushes you to put one of your arms in the pit. Almost instantaneously, it becomes thick and hairy, with the same tannish-brown color. You try a leg, and watch as you foot becomes a hand with perfectly movable fingers and a thumb. As you stare in wide-eyed disbelief, the woman gets impatient and shoves you in before jumping after with her son.
Inside the pit, you feel a strange warmth surround you as the latex works its magic. You feel a coat of fur sprouting from the pores of your skin, your head getting more compact. You move your tongue and can feel the sharp canines in your mouth.
Eventually, you crawl out of the pit, followed soon after by the woman and the boy. All three of you are now full-sized monkeys, though you can't tell whether you're gorillas or chimpanzees. The woman is calmly stroking her son's fur and locks eyes with you, looking like she has something caught in her throat. Then, she starts to talk normally, albeit in a deeper voice.
"Takes a while to get used to speaking, so don't bother trying for now. You'll just sound like a damn dirty ape. Now, let's get moving. We need to find the rest of my friends before, well, you'll see. Oh, and try not to trip over that."
You look down and see that your cock is a now a nine-foot long beast, with equally-large balls to match. It'll take some time to keep from tripping over the thing, but the thought of putting your new beast to work makes you feel very aroused. Fortunately, the female ape slaps you before you start getting hard.
"Don't get any ideas. You're not the first horny primate I've had to neuter."