Dirt And Blushes.

Chapter Four.

A/N: This is continued by request from Peya Luna, who pointed out that Bumblebee didn't get anything in return. Starscream/Miles and Ratchet/Mikaela will be covered in later sequels (as suggested by IchigoPudding, Blackrose-FlowerofDeath, BoredTech, and ShiTiger). For now, enjoy!

When Sam awoke, it was to find the cerulean gaze of his guardian wandering up and down his now-clean almost-naked body. He smiled happily, warm and comfortable in his bed, remembering with pleasure the extended wash his guardian had given. Surely, now, they were, or would be closer than ever? Than his mind came to the embarrassing conclusion that although he had greatly enjoyed their interactions, he had no idea if Bumblebee had gotten anything out of it. The realisation made him sit up straight. How could he have been so selfish as to not check that Bumblebee had enjoyed it as much as he had?

"Sam? Are you okay?" Bumblebee asked, bringing his face close in concern. Sam reached up to stroke it.

"I'm fine, Bee, but I just realised, you would probably appreciate a wash too, and I know Ratchet has some of your favourite shampoo in stock, because I brought it! Come on, you need a wash too!" Sam said. He stood up, only pausing to tuck a towel around his waist, before grabbing Bumblebee's left index finger in his hand before setting off at a determined pace to the alt-wash. Bumblebee had more sense than to protest, and allowed himself to be taken there.

Sam paused just once, to pick up the shampoo he had bought plus wax, beeswax polish, washing cloths, sponges, chamois leathers and towels so he could give Bumblebee a proper going-over. Then he put the items down, and waved to get Ratchet's attention. Once he'd got it, and asked him to turn on the alt-wash, to Bumblebee's delight Sam discarded his towel, flinging it merrily out of the way before grabbing a big sponge, and dolloping a big gobbet of shampoo on it.

As the water came down, still at a temperature they could both appreciate, Sam rubbed one hand over the shampoo on the sponge until it was thickly frothing, then he began rubbing it over Bumblebee's feet.

The yellow Autobot had never been washed by Sam in robot mode before and found the sight of his naked, unprotected guardian bent over and scrubbing at his feet oddly arousing. Sam was diligent and thorough, making sure he didn't miss under Bumblebee's instep, lying on his back to access the narrowest spaces while Bumblebee did not flinch an inch, fearful of crushing his human friend with one injudicious move.

Once Sam had finished with Bumblebee's feet, he put a bare foot carefully on to one of them and pulled himself up. Bumblebee was about to tell Sam to be careful when he felt Sam running a soapy sponge over the front of his lower leg, and then behind some of the plating and between the wires and struts and cables. He gave an odd, mechanical laugh, it tickled, but it felt good. Sam reached up and clambered up, and Bumblebee did crouch and put a hand beneath him so he wouldn't fall, but Sam had a secure grip and didn't even slip.

He kept this up till he reached Bumblebee's knee, and then climbed down, all ready to repeat the process on Bumblebee's other leg but Bumblebee put out a staying hand and indicated that the human should back away. Sam did, puzzled, but all became clear as Bumblebee got down to a sitting position, his aft on the floor and his legs straight out ahead of him. Sam nodded approvingly, and moved over, completing his work on the second leg a little quicker, with Bumblebee lifting it and bending it at the knee where needed to aid Sam's efforts.

Sam took a breather then as he soaped the sponge with a new gobbet of the shampoo and lathered it up, but then hopped into Bumblebee's lap with surprising agility and began rubbing Bumblebee's abdomen and codpiece with the soapy sponge. Although Cybertronians had no reproductive or interfacing equipment down below - all the action took place between the Sparks and processors – a lot of cables and sensor-relays ran through the codpiece. It was where the legs joined the rest of the body, and it contained a large node where cables and wires entered, were routed to the right part of the body, and the signal exited via another cable.

When Bumblebee began trilling musically and shaking, Sam realized he'd hit on a sensitive place on his yellow friend, and redoubled his efforts. Bumblebee's doorwings twitched and he put his arms out behind him, hands on the floor, to brace himself. Deciding to remember the codpiece for future reference, Sam carefully began moving his strokes upwards, over the abdomen, Bumblebee putting out an obliging hand to help him get to the chest as his shakes subsided and he regained some control over his reactions.

The chest was another sensitive place, however, so Bumblebee kept the other steadying hand in place, enjoying the sensations spreading through his chest plates in reaction to Sam's exploratory swipes. He trilled again and then whistled, his optic iris-shutters dilating and contracting in pleasure, and his doorwings fluttered and twitched involuntarily.

He startled a little when Sam vaulted to one shoulder and swung himself to a position on 'Bee's back. Bumblebee tried to still his doorwings, for fear of hurting Sam, but the human said "Chill, 'Bee, I'm safe here." Sure enough, a close scan revealed that Sam was tucked behind one doorwing, had found a secure footing and had several inches of clearance. This was just as well because when he reached out and began soaping the nearest door, the resulting sensations left Bumblebee with no control of its reaction.

Sam for his part was gratified that soaping the sensitive appendages did, as he had hoped, set them to twitching and trembling. Sam knew that his big yellow friend was enjoying the attention, but was careful not to get in the way of the mobile structures. He turned his back to the wing, careful not to arch it and risk getting it caught, and soaped up the back behind the wings, letting the foam cascade down around the joints, smart enough not to touch them while the wings were in motion. He carefully managed to clamber up to Bumblebee's neck, giving that a good soaping (and from Bumblebee's cries and head twitches and body-shudders, knew he was enjoying it) before climbing down behind the second doorwing and soaping that one up as thoroughly as the first.

He would have killed to scrub the windows on the other side too, but realised that without a secure footing it would be dangerous. Anyway, judging by Bumblebee's whistles and croons, he was very much enjoying it already, and Sam knew where to return to in order to bring Bumblebee to overload!

He clambered carefully down one side, soaping as he went, to arrive back in Bumblebee's lap. He turned his attentions back to the codpiece, sweeping and stroking the sensitive area both with one hand and the sponge. He reflected that he had not washed Bumblebee's head, arms, or other side, but decided he could do that later, Bumblebee needed some relief, and Sam intended to give him it!

A few minutes later, Sam's touches had the desired effect: Bumblebee sat upright, even his doorwings pointing to the sky. His trilling increased in volume and pitch and was abruptly joined by his vehicle horn. His optic shutters irised inward, almost completely closing and his chest-plates twitched, followed a second later by the rest of his body. Then the scout's limbs relaxed, and Bumblebee slid slowly down from his seated position on to his back.

Sam scrambled up to sit on Bumblebee's speaker, careful to watch his footing on the slick metal and paintwork, stroking Bumblebee's cheeks till the scout's optics opened and the normal soft blue glow returned.

"Did ya like that, buddy?" he asked. "I've got to do your arms and head but that shouldn't take long, eh?" Bumblebee's response was a muted, affirmative warble from his speaker that vibrated against Sam's buttocks, penis, and testicles in a way he was surprised to find was arousing. "Hey, cut that out, or you'll get me aroused again and then you'll have to wash me again!" he chuckled. Bumblebee repeated the warble, which was quickly followed by a mechanical chuckle. He indicated first the sponge Sam had discarded and then the bottle of shampoo.

"Why not?" he asked. "That wouldn't be a problem. There's still water and shampoo enough for us both."