Let's touch dicks, dude!

I could have him turn more feminine, but...I dunno, still feels kind of skeevy toward Shizu. Besides, I'm attractive enough as it is. Even if I was still fooling myself into thinking I'm only attracted to the opposite sex, what's the opposite of "sexless"?

"Are you just gonna' stand around thinking excuses to yourself all night? Just start touching yourself already!"

"Okay, sheesh!" Rimuru stepped forward, getting nice and close with his beautiful doppelganger. Mental note: work on my snippy attitude. He reached down and wrapped his fingers around the schmeat jutting out from between his doppelganger's thin legs.

Mental note: I can hear myself think, jackass.

"God dammit!" Rimuru yanked downward, having failed to remove his hand from his clone's member before throwing his hand down in frustrating.

"Yee-- ahhhn-- ow! Watch what you're doing! Are ya' tryin' to rip it off?!"

"Keep back-sassing me and I might just do that! Then I'll shove your whole dick up your own ass!"

Both Rimurus froze and shared a moment of silence, which was broken by the real one.

"Wait-"

"That sounds-"

"Kinda' awesome, actually. Am I really that much of a freak?"

"Yes. Yes, I am. Case in point:"

The doppelganger stepped forward, eradicating the foot or so of distance that had still been between them. Which left their dicks with nowhere to go but right up against each other, the tips pressing together and stimulating one another as they were pushed upward by the shafts following suit.

"Nnnahh! Oh, god!" Rimuru had to use all of his willpower to not orgasm right then and there. He'd have liked to think that he had more stamina than that.

"Fuuuck, dude, I know!" the doppelganger agreed, feeling shaky in the knees. "What were you thinking, blue-balling yourself for two entire freaking years?!"

"Heh heh heh! I am a blue ball, it's my naturaaaaahhaahahhh..."

The clone cut him off by moving his hips once, grinding his cock upward and down against the original's. "_Nnnnndon't..._get cute with me, you goofball, this isn't the time for thaaaaah! Ahhhh..."

Rimuru returned the favour, his moans echoing his doppelganger's. That one last motion was all both of them needed to send them over the edge, their continued moans serenading the arrival of a fountain of pale blue. The hot, sticky goop erupted out from between their slim forms, covering both of their chests, getting in their hair, falling onto the carpet. Some of it even reached the ceiling.

I'm cumming on me! Other me is cumming on me and I'm cumming on him! Being a monster is greaaaaaaaat!!!

Spurt after spurt, their orgasms rocked their bodies against one another, helping them prolong the sensation for a solid thirty seconds before it finally faded. Rimuru stumbled backward into bed with his legs hanging over the side, while his doppelganger fell straight backward onto the carpeted floor, surrounded and covered in the best approximation of semen his slime body could produce. Both were breathing heavily as they came down from their orgasm, their senses slowly returning to them after being blocked by a curtain of blue.

"...Daaaaamn. How the heck did I go without this for so long? Oh, yeah, by disassociating my slime body from my human mind. I wonder if the reason why I never got a girlfriend in thirty-seven years is similar?"

"More."

"...Eh?"

"Don't "eh" me. You want more. You know it. I know it. Our dicks know it."

"Our-- Huuuuh?!" Rimuru couldn't finish the question, startled by the sight that greeted him when he lifted his head to look at his double. Surely enough, blocking his view of the other Rimuru, was his own erection, still as long, hard, and girthy as it had been when they started. "Wait, how in the fiery, blazing heck is that possible?!"

<<Answer: Your body is not human despite being shaped like one, as such it is not bound by the same physical limits of one. The hormones resulting in your erection are just as much a product of [Universal Shapeshift] as the rest of your human form. Following your two-year dry spell, your arousal is unable to be sated by a single orgasm. Your replicant is correct when it states you desire further pleasure, and as long as that desire exists, [Universal Shapeshift] will continue producing these hormones.>>

"...Alright. So what should I do now?"

"That's gonna' be your call, boss man. But we both know the hardest part is going to be narrowing down your options."