5.

There was a cave both factions knew of in the rock of the desert cliff. Ratchet had hidden there at one point during a Decepticon attack, as had Starscream at a different point in time. The area was regarded as a neutral ground for the most part, and was deserted except in times of crisis.

Once in the cave, out of sight from potentially prying eyes, Blaster relaxed his shoulders, turning casually to the other mech. "Y'wanna sit down?"

Soundwave complied almost instantly, folding into a hunched posture that seemed as easily assumed as his alt-mode. Blaster sprawled himself on the rock next to him, feeling oddly at ease in the Decepticon's company.

After a moment, Soundwave spoke. "Blaster."

"Yeah?"

"Two things to show you. Then will act favorably or unfavorably after gauging your reaction," the dark blue mech rumbled quietly. With a slow, practiced motion, his tentacles slid from their usual places of concealment. The Autobot made no verbal comment, instead reaching a hand out to touch the feelers on one wonderingly. It trembled at the gentle contact. Soundwave coughed awkwardly, the caress sending warm signals to his abdominal plating. So far the mech hadn't shown any sign of surprise, let alone revulsion. Perhaps...

Soundwave placed a hand on Blaster's shoulder. "They do not bother you?"

"Nope. They're for passin' information, nothing more. They're dead useful too. Wish I had a few," the other said matter-of-factly. He eyed the ribbing along the appendage, seeing the flush of energon traveling just below the surface.

Soundwave glowed internally. Perhaps there truly was some compatibility between himself and the Autobot. "Something else to show you as well."
Blaster scooted closer until his hip was touching the larger mech's. "Go ahead. If you're talking about Laserbeak-"

Soundwave cut him off with an upraised hand. "No. Not drone." Slowly, carefully, and sending one last scan to the skies above him, making sure they truly were alone, he removed his face mask, releasing the catches on one side with a hiss before proceeding to the next.

Blaster stood up to see his face and froze. Light violet optics, almond-shaped and delicately tilted, were large in a narrow face. The nasal ridge was not pronounced; a small mouth with thin lips, currently sealed tight, added character to perfection. Soundwave was absolutely handsome behind that mask. The red and yellow mech grinned. "Damn."

Soundwave's face plates only registered confusion. "You are not attracted? Human expletives are generally not accompanied with amorous intent."
"Depends on where you're looking," purred the other, vocalizer dropping an octave. "I used it instead of 'holy frag you're absolutely gorgeous.' Saved time."

The mech really didn't know how to conceal emotions, Blaster mused, watching Soundwave's emotional spectrum shift from distress to irritation to bashful anticipation. He decided he liked that. It made the stoic communications expert seem much more alive, more than just the drone that the other Autobots dismissed out of hand.

"Blaster...interface amenable." The larger mech tentatively stroked the smaller mech's frame with a single servo.

Suppressing a shiver of pleasure, Blaster nodded, but still had to laugh at the way it was phrased. Soundwave moved to put his face mask back on, but Blaster held his wrist. "Nope. Keep it off." The smaller mech moved as if to stroke Soundwave's seams, but the Decepticon was faster. In one smooth motion, the red and yellow mech was dazedly on the other's lap. "Wha-" he began, but Soundwave cut off the question with a firm kiss to the lipplates. Blaster, after a moment of stiffness, reciprocated, loosening his jaw and trying his best to relax and encourage the other mech.

Soundwave drew back after a long moment, optics blazing with intent. "Blaster. Spike or valve mech?"

"I'm flexible, my mech," the other said lightly. "Which do you prefer?"

Soundwave considered the possibilities. "Difficult to say. Previous relationship was with mech similar to self. Tentacles were sufficient for external overload."

Blaster raised an optic ridge. "Well, I don't have any of those myself, but I'm very familiar with spike and valve. I'll try to make you feel good."

Soundwave offered him a shy smile. "Show me, please."

"Well, first thing, you've gotta relax," Blaster said gently. "Tell me what you want."

Instead of answering, servos with long fingers delicately traced symbols along Blaster's frame; he shivered, giving Soundwave pause. After a moment, a single feeler wound its way around the Autobot's abdomen, gently tickling and probing as it went, seeking the largest heat source.

"Frag-!" Blaster gasped. The Decepticon smiled to himself. Clearly enjoyment was for both parties, but for the moment, this casual teasing was almost as much fun as any physical interfacing. The red and yellow mech writhed in his lap, trying to increase the friction around his panel.

With an internal command, the tentacle withdrew, leaving the mech's engines whining. "S-soundwave-"

"Open your panel." There was no questioning tone in the larger mech's voice; the Autobot gulped and nodded frantically, complying instantly. The feeler moved lower again, circling the mech's most sensitive areas intimately.

"Stop teasing," Blaster begged, vocalizer crackling. "Primus, 'wave-!"
If Soundwave was surprised or annoyed by the nickname, he made no outward demonstration of it. Instead, he smoothly inserted a feeler into the Autobot's valve, pulsing little tendrils of energy along its length. The mech was arching with pleasure, optics darkening as power surged through each tendril.

Slowly and carefully, Soundwave eased a second, then a third tendril into the mech's now-weeping valve. Thrusting smoothly, keeping each tendril just out of sequence with the others, the communications expert was surprised to see Blaster scream in overload only a minute or so after his first tentacle.

Panting hard, the red and yellow mech grinned up at the other. "You sure know how to show a mech a good time, Soundwave." Positioning himself, Soundwave smiled a little before withdrawing his feelers to stroke sensitive spots under the windshield and around the speakers. The other let out a small moan, optics flickering.

"Further stimulation acceptable?"

"Primus...absolutely, 'wave..."

The larger mech carefully laid the Autobot down on his back, flush to the floor, before slipping between Blaster's legs. "Please relax. Mutual pleasure desired."

Blue optics, darkened by lust, gazed up at him trustingly. "My mech, I'd follow you t' the pit and back right now..."

Soundwave allowed himself another small smile of victory before opening his panel. Blaster's optics followed the extension of the others' spike in half-amazement, half-anticipating pleasure. Without another word, the larger mech hiked Blaster's pedes up to his shoulders and pushed gently into his valve until he was fully seated. Sparing another glance at the Autobot's face to make sure everything was still pleasurable for him, the navy mech began to move. Slowly at first, then with increasing tempo and aggression, the two mechs gasped and connected in unison before withdrawing, only to begin the entire process again a second later.

"Babe, I'm gonna-" Blaster begged. "Gonna overload in a second-!"
Soundwave's mouth was open as he reached his own climax, rumbling, "Proceed, lover." Whether it was the tone or the word choice, Blaster screamed and arched his spine back sharply in overload. Soundwave followed soon after, letting out a groan of release totally unlike his normal precise tones.

Collapsing next to the smaller Autobot, Soundwave smiled, a genuine, delicate smile. "Pleasurable?"

Blaster grabbed his shoulder and hauled him closer. "Incredibly," the red and yellow mech whispered. "It'd be a shame to let factions come between us at this point."

"Agreed." Soundwave, at that moment, did not care that he was a Decepticon, that they had just committed treason on both sides of the faction coin, or that their relationship would be difficult to maintain. He hadn't waited six million years to find someone this perfect only to have them be torn from him.

"Soundwave: emotional turmoil," Soundwave confessed softly. "Loves...Blaster."

The Autobot wrapped an arm around his waist in sympathy. "Believe me. Feelin' it too. We'll figure it out, though."

Soundwave wasn't sure how, but he'd fight to keep it that way.