Symbiote Thing

Drunk late at night, you wander out of a local bar, unsure of the time. All you know is that it's dark and a long drive away from home. Grabbing out your phone, you walk a few blocks down the lonely street. passing an alley, you stop as you hear a strange inhuman noise come from behind a dumpster. In your stupor, you stumble over to see what it was that made the noise. You turn looking behind the dumpster to see a plastic bag covering whatever made the noise. Your hand fumbles, slapping it a little.
Strange goo is attached to your hand and begins covering your skin, slowly engulfing you. Panicked you scream as it enters your mouth, falling onto your back, your vision fades and you pass out.

You wake up in bed at home to the sound of your alarm, was last night a dream? Did you just not remember the ride home? "No, we brought us home." A voice says inside of you, foreign to your head. Your heart starts beating faster, unsure what the voice is. "Are we confused?" the voice once more chimes. "Who... no, what are you?" you nervously ask the voice. "We are you, and You are us." You stand up, unsure what manner of delusion this is, you walk to the bathroom, looking in the mirror, you ask yourself simply "Am I going crazy?"

"No, we aren't." Your reflection replies. Your eyes widen as you stumble back, your reflection slowly shifting into a strange tall monster, akin to some movies you've seen prior. "Was last night real?" you ask the vision in the mirror. "Yes, you found us." Trying to process this, you set yourself down on the toilet seat. "Is this like some thing where I get powers and have to use them for good?" you question the creature, it replies "We have powers as you'd call them, but we don't need to do anything... I am you and you are me."
You think to yourself for a moment, realising that this might not be so bad, having some strange thing in your head, you stand up. "Could I see you?" you ask, curious to see the true form of the creature bound to your body. "If we promise to make the I a we from now on, sure." The voice replies coyly, you simply agree, not thinking about the consequences of becoming a permanent host to the creature.

The pores of skin on your hand slowly leak a black substance, the creature moving beneath your skin and exiting your body. It forms a constantly shifting puddle, reforming over and over again. The voice is no longer in your head as you think to yourself, you observe the strangely beautiful creature for a while longer. You finally snap yourself out of it, placing your hand on the amorphous creature as you mutter a "Thank you." The symbiote slowly covers you again, though this time you remain calm, watching as it slowly enters you, feeling it flow throughout you. You feel strangely whole as it bonds with you once more.
"We thought you might run..." The now familiar voice says, you look back into the mirror, seeing the beast once more. "I wouldn't, I'm kind of a freak I guess."
"We noticed when we looked through your memories while coming home." Oh shit, he knew everything then. You try to stay calm, but you know that if he can read your memories, he can likely read your thoughts. "You're quite cute when worried." You can feel the sincerity of the creature, it warms your heart a little. You turn walking out of the bathroom, hungry as can be, you head to the Kitchen. "So, what are we?" You ask your better half. "We are what you'd call a Symbiote, there are not many of us on earth."
"So We're one of the lucky ones?" You smile to yourself as you grab out some utensils to cook. "Yes, we are quite lucky." Thoughtlessly, you pull out a pan, knocking over a stack of glasses, your hands full, you panic as they fall.

Out from your shoulder, a stark black arm jolts, catching the glasses with it's shiny hand. You stand shocked as the arm slowly puts the glasses back where they belong, in awe at the idea of having more than two arms, you open your mouth to compliment the symbiote. It cuts you off, "No need to compliment us, we are you" "It was still cool though..." you mutter to yourself as you continue to cook.

You hadn't realised how hungry you were until now, but you quickly finish off a plate filled with more than twice the serving size you'd usually eat. "Is this something to do with the whole symbiote thing?" you ask, it replies swiftly "Yes, we need to consume more so we both get proper nourishment, though we are far stronger than any mere human as a result." You briefly consider joining an underground fight club in order to quickly get some quick cash but decide against it in the end. "So, we're basically a superhuman?"
"Precisely." You briefly smile at the notion, happy to have stumbled upon this odd creature. You head back into the bathroom, stripping yourself, you look to see if anything has changed physically. You don't feel any different, however you can more clearly see your veins, as well as a slight hint of something moving beneath your skin. The idea of something beneath your skin would typically freak you out, but for some reason, now that it's happened it feels oddly comforting, as if you couldn't do without it.

After a moment observing, you casually ask the symbiote, "Are you able to cover me? Like how things are in the movies?" You feel the symbiote's amusement as it moves inside you, slowly seeping out of your pores and covering you once more. Your vision goes black like before, but you don't pass out. slowly, vision returns, though it's distant, as if you aren't in control. "We control us like this, we're much stronger, but it is very tiring." You see your form in the mirror, almost 2 whole feet taller, rippling with stark black muscles. A monstrous face has replaced your own, sharp white teeth protruding out. Even though the sight should repulse you or instill fear in you, you for some reason once again find comfort in it.

The symbiote slowly relinquishes control to you, seeping back underneath your skin once more. You open your eyes to seeing yourself in the reflection once more, amazed that any of this is possible. "I think I love you" you say absent minded. You feel the symbiote stirring inside of you, as if it's embarrassed to be told that. "You're quite strange," it remarks, "We like that though." You smile to yourself, putting your clothes on, you're very much going to enjoy living with this symbiote.