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B-127 "Bumblebee", blasted the last Seeker drone away with his Energon Blaster, and yanked out his wrist blade from the corpse of another, then sheathed is weapons. His battle mask retracted back to show his faceplate, and he went to his comms.
"This is B-127 to any Autobots in the area, come in". He waited for a reply, but none came through. He put a hand to his crotch, and crossed his legs. He had ignored the need to relive his bladder, which had slowly been filling up while he continued fighting. Now, he was at the bursting point. He sent another command to his bladder to keep his lubricant from escaping, which seemed to help a little, and so he continued on his mission. Upon coming to a clearing, he saw a group of decepticons making camp. Redeploying his battle mask, and activating his blaster, his visor zoomed in to get a better view. His bladder pinged again. "Not now", he told himself. He needed to focus on the mission, upon getting the info back to Optimus and the others. He took a step, and a twig cracked.
"What was that?" A decepticon officer asked.
"I don't know, sir," replied a seeker grunt. "You want me to go find out?", he asked.
'Yes," replied the officer. "If you find him, bring it to me"
Yes Sir!", replied the grunt.
"Oh no." whispered Bumblebee. "I'm fragged if they find me. I have to get out of here". Upon turning to run he felt his spike twitch and a squirt of waste wetted his codpiece. Whimpering, he transformed and sped off onto the highway. Upon loosing the 'cons, he pulled into an abandoned warehouse and transformed. Holding himself and crossing his legs, he whined as he felt another squirt of waste enter his codpiece. He was so desperate. He looked for something, anything, to empty his bladder into, but found nothing. This was it. He was on the brink, about to burst. "I can't hold it anymore", Bumblebee said. He felt tears well up in his optics as he began slowing wetting himself. Unable to take it anymore, he let go. A hissing sound came from him as he finally emptied his bladder into his armor, leaking out onto the floor beneath him. He shuddered and moaned at the feeling of release that had been in his way for hours. Finally finishing, he opened his optics, and looked down at the puddle at his feet. His spike, aft, and legs were soaked with lubricant. He felt more tears come, and he let them fall. After a few minutes, he had calmed down enough to stop crying so he could continue his mission.
Upon moving to leave, another feeling shot through him. An unexpected one: arousal. Curious, he rubbed a hand against his codpiece, and felt pleasure from it. "My Primus", Bee gasped. "I didn't think that this would feel so good!". Sitting down with his back against the wall, he moved his legs and hands like he did when he needed to pee, and the arousal only got stronger. Continuing like this for a bit, he then felt the call of an orgasm, and chased it hard. He could barley focus, and moments latter he felt the overload happen. Shuddering, he felt his spike shoot transfluid into his armor. It felt amazing. "I should do this more often", he told himself Feeling tired, he curled into the fetal position, and fell asleep shortly after.