"I don't think I can live like this, I'm a dude and I'd like to stay that way."
You make your way to the waterfall, nervous about what will happen.
As you cross over, you feel the change begin. Your breasts remold into perfect male pectorals and your shoulders grow wider than they already were. Your buttocks reshaped into a more masculine but equally large shape. Your arms, torso and thighs bulk up and you feel your face reshape into your pervious jawline as you feel your facial hair return.
Your tail reshapes, becoming more powerful. The scales shift into deep blues and greens and your tail fin becomes more streamlined, less frilly. A ridge forms on the back of your tail, from ass to fin. Meanwhile two pairs of pectoral fins sprout from your hips and where your knees used to be marking where the more tubular back of your tail becomes the flatter front. Scales like body hair begin flecking lower arms and your torso from your pecs down your belly to form a treasure trail towards your genitals.
Most importantly, your clitoris enlarges back into a penis released from your pelvic cavity with a good amount of foreskin, as your balls emerge from and replace your slit. Your manhood is even bigger than before and harder than ever.
You run your hands down your body, exhilarated at it being restored to an improved version of it's previous state. You stop at your restored cock, proudly jutting out from a depression formed by the seem where your legs would have met. You begin to give your old friend the attention it deserves.
"I see your taking a liking to this"
Startled, you look up to see another merman with shoulder length blonde hair and a goatee. You're struck by how incredibly handsome he is, a poweful swimmers build and a cock to envy. He smiles at you playfully which makes you blush.
"I see you like what you see too."
"No-- I--" You can't deny it. You're incredibly attracted to him. Did becoming female make you gay? Maybe it unlocked some latent bisexuality. Whatever happened, you can't pretend like you don't find him hot now. Especially not with your cock still very hard at the sight of him.
He swims closer to you, just close enough for his equally hard cock to touch yours
"Relax, buddy. Don't overthink it." He says as he brings you close and kisses you. You struggle at first but then you lean in and your tongue meets his. Your cocks rub up against each other as you grind together.
"I'm Matt"
You respond with your own name, the last syllable extended into a moan as he begins to nibble on your ear.
"Glad to meet you" He whispers before continuing to your neck, then chest lapping at your nipples. Kissing and licking down your torso until he reaches your cock. You moan as his tongue makes contact.
You caress the back of his head as he begins to pump up and down. Unable to resist any longer, you help him reposition in such away that his cock is in your face, aching to be tasted. Your first taste of cock shatters any last sense of exclusive heterosexuality. You greedily lick and suck, learning from Matt's more experienced movements on your own member, encouraged by the pleasurable noises he makes with each attempt.
Eventually, your mouth is met with warm sweetness as his cum fills it. The sensation causes you blow your own load. You decouple briefly for him to flip back around and kiss you passionately. Your cum blending in your mouths, two very complementary flavours.
You guess swimming with the mermen wasn't such a bad idea after all. You're beginning to like your tail, you think it looks cool. Sucking dick isn't so bad either. You find yourself getting hard again, maybe it's time to try out your prostate? Or Matt's?