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“Captain… I must inform you that for some time now, I have been resisting the urge to urinate.”
Kirk blinked, sure he hadn't heard that right. “Come again, Mr. Spock?” He kept his voice low, barely more than a whisper; for over an hour, the two men had been hiding in a cramped supply closet, the nearest available hiding spot they could find when the hostile aliens had come close to discovering their presence. It was a long story, one involving attempts at diplomacy, a labyrinthine government building and of course, the closet they were concealed in - one of many rooms connected to the banquet hall on the other side of the closet door. The aliens could be heard chattering, bickering about what steps to take next, how to find the invaders and what was to be done with them once they were found. Kirk didn't much like any of the options he'd overheard so far.
“Just as I said, Jim. I am afraid I have reached the limits of my self-control, and will soon experience an irrestible urge to-”
“To urinate, right, right,” muttered Kirk. “And you couldn't have let me know sooner?”
“I… had hoped I could exhibit more mastery over my bodily functions, Captain. Additionally, I had anticipated our escape from this location being effected much sooner. It seems these aliens are of the indecisive sort.”
“Well, you can't just piss in the corner, Spock. They've got damn sensitive noses. I'm amazed they haven't sniffed us out in here already.”
“Indeed, it is most curious. Perhaps what you call ‘luck’ is on our side. Nevertheless, I agree it would be most imprudent to freely urinate with the aliens so close by.”
That gave Kirk an idea. “Why not use some kind of container? There could be something in here, some bottle of cleaning fluid-”
“I suspect locating an appropriate receptacle in the dark, with no way to ascertain whether a particular container might contain a strong-smelling fluid that would attract olfactory attention, would be no simple task.”
Even though he couldn't see the Vulcan’s face clearly in the poorly-lit space, Kirk knew Spock was wearing his trademark quizzical expression - one eyebrow quirked. He sighed. It was absurd that the situation has come to this - he couldn't believe what he was about to suggest - but he couldn't deny the thrill of excitement dancing up and down his spine.
“Then there's only one solution,” he murmured, turning around carefully in the tight space to face his first officer. “I think you know what it is.”
Spock made no reply, merely pressing his lips together and flushing slightly green. He, too, had been secretly hoping - perhaps not for this exact outcome, but…
Kirk placed his hands on Spock’s chest and slowly made his way to his knees, sliding his palms down as he went until they were at Spock’s waist. He was glad the closet was just big enough to accommodate the two of them like this.
Any human in Spock’s place would have struggled to keep his composure as Kirk firmly tugged the Vulcan’s uniform pants down and took him in hand, warm, soft palms wrapping around his cock. “Stay like this,” he urged, referring to his flaccid member. “Remember, we have to be quiet…”
Spock rolled his eyes ever so slightly. “I am not the one who needs to be reminded of the imperative to remain silent, Jim.”
Kirk wanted to laugh at that, but it would have been too loud and he certainly didn't want to be discovered just then - not when he was about to have a very sexy treat. So instead, he muffled his reaction by swallowing down Spock’s long, soft cock. It felt hot and heavy in his mouth, and there was still more to come.
His lover knew what he wanted to hear, so he played up his desperation a little for Kirk’s benefit. “Captain, I cannot restrain myself much longer… Are you sure you are willing to assist me in this manner?”
Kirk pulled away long enough to whisper hotly, “Of course I'm sure, just let go, I won't spill a drop. Fuck, just let me have it already!” He sucked Spock’s cock back into his mouth and nuzzled his face into the Vulcan’s groin. So smooth, so warm, so muscular.
“Then I must acquiesce. Prepare yourself, Captain. Once I begin, I will not be able to stop until my bladder is substantially emptied.”
Kirk signaled his eagerness and impatience by pressing one hand into Spock’s belly, and that was it - the Vulcan’s self-control snapped.
Hot, musky piss flooded Kirk’s throat, filling his nose with the pungent scent and his body with lust. His cock, already half-hard, quickly rose to full mast and he couldn't stop himself from rutting forward against Spock’s leg. The friction was delicious, even through their uniforms, and he groaned with bliss as he swallowed down mouthful after mouthful.
Spock brushed a strand of hair out of Kirk’s eyes, marveling at how well the human was taking it. “Most impressive. Be mindful of your volume, Jim.”
Kirk nodded, lips sealed tightly so he wouldn't spill, his face red and eyes shining as he greedily choked down everything Spock could give him. His throat was working hard, swallowing so much liquid, and his hands were running needily over Spock’s waist, his hips, his ass. He was grinding ever more frantically, and that was adorable, but just wouldn't do.
“Captain, it would not be advisable to ejaculate in your uniform. The distinctive odor would certainly reveal our presence.”
Kirk whined, his thoughts having gone pleasantly fuzzy and incoherent over the last minute and a half. He stopped his movements with great reluctance and focused on slurping down the last few drops of Spock’s piss, salty and tinged with a fragrance unique to his lover. He slyly tongued at the urethral slit, hoping his teasing mouth would tempt Spock into taking his pleasure, but a Vulcan could not be distracted so easily.
“Now, now, Jim. My bodily needs satisfied, it is logically apparent that we must switch focus to our mission. I believe the aliens have moved on from the adjoining hall and we may make our escape.”
“Right now?” Kirk pouted, looking up at Spock imploringly.
“Right now. However… Once we have extricated ourselves from this highly unusual diplomatic situation… I find myself amenable to continuing this encounter tonight in our quarters.”
“Until tonight, then, darling.” Kirk straightened up to his feet and planted a kiss on Spock’s cheek, willing his erection to behave and wait for just a few more hours. He could be good a little longer.
“Until tonight, beloved.”