You possess a man you've never met. [Nina's POV]

You pull yourself up out of the sand and rub your sore neck.
You have a killer headache.
Wait.
If you have a headache that means you have a head! You did it! You got a body! It's not yours, but hey, who cares!
This is-
Urgh.
There's a pain in your... everything. You feel a rumbling in your gut. It's all so-
Then, before you can even think, you clutch your stomach and puke up a black cloud. Swirling dark mist pours out of your mouth. It tastes like ash and sweat and its' burning the inside of your mouth. The mist falls onto the beach in front of you and pulls together to form another one of those demons.
It's an ugly thing, with blotchy skin and cracked horns jutting out of it's head. You cough and sputter as it forms and the last of its' form passes through your lips.
"RAAARGH!!!" It shrieks'. "Wretched soul! You think you can take my hard earned form. I will evolve! I will survive! I will-"
You don't know how that would've ended, because it seems to realize something mid-sentence. Its' head snaps in the direction of the setting sun and it recoils at the last rays of sunshine hitting it's true body. It quickly turns to you and reaches out for you. You fall back into a big bush as it grabs at you.
"Give me that-"
This time, it has no way of finishing. It quickly bursts, exploding into a pile of dust. You flinch as some of the pale powder hits your leg.

It's dead.
The sun killed it.
That explains a lot. Why their taking over people, why they waited till dark, why these things haven't taken over the whole world already.
The sun is deadly to them.
You silently thank the sun for it's help.

And then you realized what your leg looked like.
It was a mans' leg.
Thick, hairy, muscly. You stick to out and wiggle the toes. The skin is dark and tanned.
"Holy shit!"
You slap a hand over your mouth in shock at your voice. Deep, powerful. Your big hands scrape against a thick beard.
"Oh! Oh!"
You marvel at your new form. Chest, flat as a board. Six pack abs. And down below...?
You stroke your new cock. It's big. Not the biggest you've ever seen, but it'd be enough for you. As you fondle yourself, you can feel it grow. The blood flowing downward, bringing you to attention.
"Oh my gosh..."

"Hey, Freddie, where are ya?!"
A voice nearby snaps your legs shut. Instinctively, you cover your chest with an arm.
"Hey, you done pissin' yet?"
It's a woman's voice. It sounds... Scottish? Is she calling you? Are you Freddie?
"Babe, C'mon, I- oh!"
A woman walks around the bush and spots you. She has red-hair cut short and pale skin mottled with freckles. She's wearing a very skimpy bikini and a pair of sunglasses. She pulls these down, looking over the rims at you.
"Baby, baby, baby... If ya wanted that ya shoulda' just asked..."