As your brain started trying to think of how you'd get out of this jungle, you felt it. A sudden urge that couldn't be mistaken for anything else.
Looking down, you saw your cock getting rock hard. Without hesitation, you started stroking it. Eventually, you came and sprayed a thick rope of semen into the dirt. With that done, your cock shrank and you went back to trying to find a way out.
A few minutes passed, and you got horny again. You stroked your cock, came, and then went right back to searching for a path or a clearing of something. Before long, you gave up on trying to leave because all you could think about was stroking your cock. It didn't matter that your brain started to feel soupy and foggy, and you were having trouble remembering things like where you were or even what your own name was, or that your hair was getting longer and shaggier, or that your body hair was getting thicker, or that the canines in your mouth were getting longer and sharper, or that your nose was starting to fold back into your face. You just wanted to keep cumming and cumming.
Before long, your stomach growled and you found a tree with delicious fruit, which you tore into, letting the juice run all over your skin and hair until it got sticky and smelly, attracting flies. After cumming again, you squatted down and took a big shit, not bothering to wipe off the feces that clung to your ass and brought more flies. You even stopped trying to walk on two legs, because it felt more natural to just crawl on all fours.
Then, you heard something in the distance. A long train of people, all wearing strange colored garb. In the front were three people: an old man in a light suit slowly pushing unpleasant things out of his way with a cane, a big burly hunter carrying a rifle and holding an unlit cigar between his teeth, and a woman in a dress and gloves with a thick, curly mane of hair. All three, along with most of the rest of the humans, had light-darkish skin. The old man was complaining about how filthy everything was, the hunter was just grinning and strutting proudly, and the woman was carefully observing her surroundings. She stopped briefly, having caught a small glance of you, before being pushed along.
The second your eyes locked, you were overwhelmed by lust for this human woman. You had to have sex with her no matter what. And so you started to make your way towards her...