"...actually, give me a moment."
Alright, if you think back for a moment, when you made a wish for the coin to get pulled back down by a force "exactly like gravity", what exactly let the stone know that the specific gravity you wanted was earth's gravity? Sure, you did say the word "earth", but was that really it? You think it over for a moment and come to the conclusion that the stone seems to more or less read your mind to better interpret what to do. You're probably completely off about that, but it does seem to be true in terms of the effect. Therefore there probably is no need to take major precautions when making wishes, as long as there is a time limit of sorts.
Feeling a bit more reassured, your mind wanders back to the possibities you considered earlier...
"The vagina of a jogging woman, a bathing woman, a bike-riding woman, a shaved vagina, being eaten out, riding someone's face, getting fingered or having your clitoris played with, or even being the vagina of a woman having sex, god, it's all so exciting."
In spite of just having blown your load, the usual post-nut clarity doesn't set in this time. Perhaps it's the fact that you're dealing with a major fantasy here that was thought to be completely impossible until recently or sheer novelty of the situation, probably both. You feel your member hardening slowly again and your patience shrinking. You grab the stone.
"Let's go step by step. I wish that I was a young, jogging woman's genitals for the duration of her whole jog including her way home and showering, assuming she does shower, plus 20 minutes on top."
Again you feel your consciousness slip, this time, however, you are prepared for what's to come.
In an instant you can feel all of your senses being warped, just like before. A plethora of novel senses hit you all at once again, as you find yourself in a dark, tight, moist and hot place. Unlike before, you're facing forwards, feeling your whole being shake with every step the woman whose genitals you turned into runs.
Just like before, you can feel and taste an inside and an outside. On the outside, you can't feel any hair rolling over your sensitive skin, but you do still feel stubs of hair growing out of you. There's no way for you to know for sure, but it appears that they're short, she must've shaved three or four days ago. More noticable is the taste on your skin however. It's very salty, a tad tangy if you can call it that, and illogically erotic. You know that you should be disgusted, but can't help feeling incredibly turned on.
On the inside, you are extremely wet, at least when put into relation to the last time you we're a vagina. The taste is a lot stronger this time, and while still sweet, it tastes more salty and "female" than anything you ever put your tongue on. You feel ecstatic.
In an effort to express your sheer excitement and happiness, you squeeze muscles you didn't know you possessed. It felt like muscles inside of your vaginal tract seemed to squeeze together, you could be wrong though, but you do know that SOME muscle inside of you was flexed.
This had an unexpected effect. The jogger seemed to slow down for a moment as she let her right hand caress your surface through the leggings she was wearing. This had another unexpected effect on you; you were more sensitive and her touch felt electrifying, despite being a mere weak pat onto your surface, through pants none the less. This only further excited you as you thought of what's to come later.
Not long after that, it felt like the fluids within you and in the panties that were wrapped around you started to become more. You began to become wetter, and your temperature seemed to increase futher.
Was she turned on? While on a jog? Sure, it's possible she saw some cute guy or whatever, but would that alone make her this wet? You were new to being a pussy and didn't know how much you could perceive as normal, but this did seem like a lot.
Just then, you made a realization. Assuming this really is a lot of fluid, which it sure seems like, it would imply that she's extremely turned on. Except, you know for a fact that YOU are extremely turned on. Could it be that you alone being turned on was enough to make you hot, wet, increase your blood flow and in turn arouse her as well? Could it be?
"One thing's clear. There is a lot more research to be done about being a woman's genitals, and I will not shy away from the task of exploring every little thing there is about it, for science, of course."
You chuckled mentally.