Topic: MTFGUser's Writing Prompts
An alien planet where humans bond with alien symbiotes upon coming-of-age. This beneficial symbiosis has become a cultural norm.
It's your 18th birthday and while you know you should be happy that you've finally come of age, you can't help but find yourself slightly dreading what's about to happen soon. It's time for you to become Bonded, to join with a symbiote, to become one with another being for the rest of your life. You know it's a good thing, that everyone who goes through it is happier, that they grow to love their bonded alien without fail, that doing so raises their general health and life expectancy to the stratosphere, that it's supposed to feel really good, and that it's just a normal part of growing up on this planet. But you also know it didn't used to be this way--that even if it's a part of the natural life cycle for the symbiotes, it sure isn't for humans. A few hundred years ago, you would've grown up to be a man, but "men" don't really exist anymore, rendered obsolete when every Bonded is a natural broodmother with a cock unimaginably larger than any natural human's--not even including all of the tentacles that can fill the same function. As you reluctantly step into the ritual chamber and glance towards your parents, a word from the old world that still gets tossed around every now and then springs to mind--"MILF"
It's not like you're not familiar with what your own parents look like--it's what they've always looked like--it's what every adult looks like, but the anatomy of the Bonded still shocks you sometimes, if just because of how different it is to your own body. You know you're going to look just like them soon. You know that everyone says you're going to love it. And that kind of scares you. Because as you move towards the center of the chamber, you can't help but look to your parents and notice how their rows of gargantuan jiggling breasts are beginning to engorge with milk and their permanently-erect cocks are leaking precum. You feel the pressure of the knowing smirks plastered on every pair of lips they have--their original mouths, their lipples, the lipped tendrils that are automatically moving to service their leaking breasts, and even the lip-sheath which your Mother currently standing to your left always keeps her cock snugly enveloped within (she prefers to use it as her primary mouth after all)--and you can't shake the feeling they're taking an almost predatory glee in your imminent transformation--in your induction into the grand conspiracy. But there's nothing you can do to stop this now.
The already-broken egg in the room's center is larger than expected as you reach it, and you find yourself wondering if it was one of your Mothers that laid it for you. You know that once you've Bonded, you'll spend most of your time pregnant with eggs just like it, perpetually cycling between gestating them within and laying them from a puffy donut-like orifice crowning a fat ovipositor just like the ones belonging to your parents which currently pucker in the open air. You've heard it's the single-most pleasurable thing a Bonded can experience, which says a lot given their already lewd bodies.
You feel the tendrils of the symbiote crawling up your calves and thighs, feeling out their new home. It's nearly the size of a pony, but you suppose it needs to be large if it's going to form your new lower body. It's a little weirdly shaped without a host, without you, but you can still easily make out the almost spider-like anatomy that's going to form the basis of your lower half, strong enough to effortlessly support the sheer mass of all the inevitable new additions to your body, with enough space to make room for even more of them--like the several rows of tits that are meant to hang and jiggle freely from below, but which are currently so swollen with milk on your second Mother due to her excitement that they're actively impeding her movement.
Your symbiote fully envelopes your groin and you let out an involuntary moan as it eagerly invades every hole in a way that seems designed to invoke as much pleasure as possible, the tendrils slithering deeper and deeper into your body until they hit something and suddenly you can feel your symbiote in a way you couldn't before, in a way you definitely shouldn't be able to normally. You don't really hear your symbiote as it reaches out to you across the flesh that's binding together more and more permanently by the second, it's not really language so much as feelings, ones which you feel so powerfully that they might as well be your own.
Curiosity, Interest, Excitement, but far more: Love. She loves you so much it's almost overwhelming, a love so powerful that she wants to spend every single moment with you, being a part of you, bringing you pleasure, creating new life with you. ...But she can't bring you that unending pleasure yet--not with your body as it is. Not without changing it into a form that would better suit both of you. Something far more feminine. Something far more soft and sensitive and slutty. Something far beyond human.
And you can feel the utter confidence with which she knows you’re going to love the body she’ll create for you, how she’s combined and integrated the genetic codes of two vastly different species for the sole purpose of creating the most pleasurable possible form for you. You feel her certainty at just how good it’s going to feel when you take on some of her own species’ instincts and start breeding, and how much she wants to share those feelings with you.
You gulp, and finally make the decision to let her in fully. If everyone else is doing it, it can't be that bad, right? Maybe it’s worth seeing what all the hype is about.