#sonknux

He pulls away, coughing and spluttering, from his latest attempt to deepthroat Knuckles' dick. The echidna stares down at him with worry painted across his face, though he keeps sitting on his hands the way Sonic told him to. The last thing he needs while he's trying this is for Knuckles and his stupid huge hands to push his head down when he's not ready—or even worse, try to comfort him when he doesn't manage to take all of Knuckles' monster cock into his mouth.

"You don't have to—"

Sonic glares at Knuckles. "Shut up." When Knuckles slowly closes his mouth, Sonic shifts his glare to his dick. It's hard, wet with precum and Sonic's spit. The shaft is long and thicker around that Sonic's forearm—and the four heads make it even thicker. Sonic swallows around the phantom feeling of those heads bumping against his throat and mutters, "Your dick is too damn big."

"I keep telling you—"

"—I don't have to do this," Sonic finishes for him in his best imitation of Knuckles' voice. "What, you think I can't do it?"

Knuckles presses his lips together. It's clear what he actually thinks, but he's not saying it. Smart choice.

Sonic shoots him another look—don't move, don't fucking say anything—and lowers his head down to Knuckles' cock again. Even just getting the heads into his mouth is a challenge, lips uncomfortably stretched and jaw hinged open to the point where it aches. Still, Sonic perseveres, sinking down slowly until he has about half of Knuckles' dick in his mouth.

He pauses there, trying to breathe deeply through his nose as he works on relaxing his throat. His jaw hurts. His mouth feels uncomfortably full, saliva pooling alongside Knuckles' thick shaft and immediately dripping down it. Part of Sonic wants to swallow, but he's been burned by that before. Better to just relax and slide down slowly, slowly...

The heads of Knuckles' dick touch his uvula. Sonic's gag reflex activates, diaphragm and throat constricting painfully. Above him, Knuckles groans, the squeeze of Sonic's throat probably feeling good—but Sonic doesn't let him enjoy the feeling. He pulls off, tucking both thumbs into his palms and squeezing until he stops dry-heaving.

"Fuck," Sonic mutters. Fine. Fine. He spits on the ground to get rid of excess saliva and climbs to his feet. "Don't move," he warns Knuckles.

Knuckles obediently stays where he is as Sonic to his room in Tails' home, grabs something from the nightstand, then back in two seconds flat. He tosses the item from hand to hand, trying not to let any of his nerves show.

The echidna's eyes widen when he sees what Sonic is holding. "Is that—"

"Yep," Sonic says, popping the p. He finally stops fidgeting, holding the fleshlight out for Knuckles to see. It's the same shade of blue as Sonic's quills, shiny and new. Sonic had felt awkward ordering it, and getting the cast made had been more than a little uncomfortable, but he's sure it'll be worth it—even if the fake mouth at the end does look pretty freaky. "That's my throat."

Knuckles frowns. "Like, lit—"

"No, not literally." Sonic rolls his eyes. "But it's modeled after it."