You can't stay here. Even if everything this centaur says is a lie, that still means there's mythological creatures around. Plus you can't deny how aroused you feel, how every sensation could push you over the edge. You need to get out, let the police know or something, and send a full squadron to this place.
You take a second to try and put your clothes back on, but it's impossible. Your nipples tense as your shirt passes them. Your dick pulsates as your underwear tries to cover it. Right now you have to go naked, at least until whatever is causing this internal heat goes away.
Turning away from the temple, you walk back the way you came. The light dimming as a heavy cloud cover rolls in. Rain starting to drip down, droplets landing on your naked body. It feels good, impacts against your skin causing you to quiver. Your sensitive body on edge, and this rain drawing you closer to release. You need to get out fast, and so you start to sprint.
As you run, the rainfall becomes heavier. Soaking into you, and feeling like the caressing hands of a lover. Grabbing onto wherever they land, then running down the rest of your body in an appreciatory gesture. It's amazing, you openly moaning as your pace quickens. Body burning away any excess fat and muscle. Streamlining you, adjusting you for your new fate.
You keep going, drenched in this rain but still feeling the rising pleasure. Your cock desperate and leaking pre, reacting to every drop from the sky with a pulse. It's like a hand is running across your cockhead, appreciating your length and coaxing you to your release. Your dick regrowing it's foreskin and lengthening with the gesture.
You're almost out now, seeing a lake up ahead that marked the start of this forest. Your pace quickens further. Breaths rapid. Mind only thinking of how good this is feeling. Starting to surrender to bliss, face flushed red, eyes closed. Imaging every droplet as a hungry beast of this forest. Satyr holding his head against your chest, nibbling into your neck and whispering about how hot you are. Minotaur groping your ass, getting you ready for his monstrous cock. Lycanthrope teasing your dick with his claw, tongue lapping at your cockhead as your balls churn.
The image is too much, you collapsing to your knees and looking to the sky. Imaging the centaur from earlier. Trotting over to you as your mouth opens. Ready for what he has to offer, stuffed with horse dick. Only tasting the rain in reality, though able to believe it would be the centaurs spunk. Viscous and virile, a feast for a hungry man like you, and the end of your chance to escape.
Your cock spurts out it's load, the rain and your mind being enough to cause orgasm. The ground a mess of white as you swallow the imaginary cum, and collapse forward. On all fours and staring at the lake. Watching as your face restructures to become more boyish and youthful. Slimmer features, more of a gap between your brows, and red lips a bit smaller. Nose less pronounced, skin tanning and becoming smooth.
It's strange to see what is happening. Your overall form now almost a blank slate. A young adult, still retaining their youthful looks. Chest flat, arms and legs thin, and face clean. An empty canvas that could become anything, that could be changed by the inhabitants of this temple.
But you can't stop now, you're at the lakes edge. You get up and go to leave. It should just be a short walk, but after a minute you're back at the lake. Then again, then again. Stuck here, and starting to feel a creatures hungry eyes on your vulnerable self...