dlc1966:

“Yeah…I can see it. Your rack n’ pinion’s leaking.”
“What?” Sing looks down. “Wait, are you talking about my cock and balls or what?”
Lochlan snorts. “No. It has to do with your power steering.”
“Stiiiilll not sure if we’re talking about foreplay?”
“No, sweetheart, we’re talking about the steering. In your car. You know, like, the wheel? Vroom vroom car go left?”
“Ugh you are such a bitch sometimes. I’d be more mad but I’m distracted by your legs.” Sing runs his hand up and over Lochlan’s knee and down his thigh.
“You can’t help yourself huh?”
“Pft, no, I can see up your shorts. You’re so shameless Daddy, it’s so hot.”
“I’m not shameless, I’m casual. You’re just- huh it’s coming from above. You’re just horny, Sing. Really horny. Like all the time.”
“Not all the time.”
“Hand me the drip pan and the wrench, so I can drain the oil.”
“The wha?”
“That plastic bowl with the silver thing in it.”
Sing pushes it under the car.
“Yes, all the time. Remember last month when we were at Geraldo’s house, and it came up how many time him and Casey have sex, and they said like one a week. And you gasped. And when Geraldo found out how often I fuck you, he asked me if I was under duress and said to call him if my dick needed to be rescued?”
“That makes me sound slutty.”
“Well if the duck quacks-”
“Ugh, I should be offended, but I’m kind of getting turned on by it actually…” Sing scoots forward and slides his hand up Lochlan’s shorts. He let his hand cover Lochlan’s penis. “Mn it’s warm. I love you feel in my palm. So thick…” Sing moves his hand around.
“Don’t play with my balls or I’m going to fuck this up.”
Sing sighs. “Damn.”
Lochlan can’t hold back a chuckle. “Hand me the rag and the oil filter wre-…the shiny thing that looks like it could grip a can.”
“But I’d have to take my hand off your cock to reach it,” Sing pouts.
“Sing.”
“Fine fine.” Sing stretches out to grab it, hastily handing it to Lochlan before returning to what he was doing. “I do appreciate you changing the oil on my car Daddy. You do take such good care of me.”
“You’re welcome. And you take good care of me. Actually that feels rather nice. Although I’m going to have to stand up soon to put the oil in your car.”
“Find more stuff wrong down there.”
Lochlan snorts. “Well you’re going to need new brakes at some point. Hand me the new filter, in the small paper box. And the silver thing sticking out of my bag on the left side. It’s a torque wrench.”
Sing passes both over. “You’re so nice and hard. I could play with this for a long time. Just moving your foreskin around is fun.”
“You have until I install this, cause then I need to stand up.”
“Ugh fine. You never last long when I’m giving you handies anyway.”
“Hey Sing?” Lochlan said.
“Yeah?”
“You know how to install an oil filter?”
“Pfft, fuck no.”
Lochlan pushes his hips up to rock against into firm Sing’s grip. “Mmh. Well. You take the filter. And you need to lubricate it, you see. So you dip your finger into the oil in the pan. And it’s still warm from when you drove your car earlier. Once you have it on your finger you rub it…in circles…around the seal…so it’s nicely lubricated. And once you’re doing making circles you uh….take the filter and screw it in. But you need the torque wrench to make sure the fit is nice and tight. Hear that? Hear the click of the torque wrench? That means it’s under the riiiiiight amount of pressure. It has to be secure in its hole. Or else, the oil will squirt out.”
Sing whimpers.
“Are you hard, Sing?”
“Uh huh.”
“Don’t touch yourself. And don’t slack off. Make me cum.”
“Uh? Oh yeah. I was just staring at your erection straining in your shorts…you’re so hot Daddy,” Sing sighs. He returns to stroking Lochlan.

Lochlan exhales. He leans his head back, closes his eyes, and lets the orgasm roll over him. “Oh that’s nice,” he murmurs. “Slow down slowly….stroke…yeah like that. Good boy. Nnnggg…”
“You’re twitching like it’s alive in my hand,” Sing purrs. “I love feeling you cum in my hand. Just so much cum everywhere. I’m always in awe how much your balls hold.”
“You make them fill up. Man, I haven’t cum in my shorts in a long time. Feels like I’m 15 again.”
“You would cum in your pants at 15?’
“Yeah. I was embarrassed about masturbation, and thought doing it to thinking about guys was wrong. And this family lived next door had this older high school kid who would always mow the lawn in gym shorts and no shirt. Just watching him would make me explode. I’d be rubbing up against the wall and not like even realize it. Or like. I was into a lot of sports at school…lotta moments losing it in my cup.”
“Holy fuck, I want all those stories. I want to hear about you sweaty and sticky and unable to tell anyone.” Sing’s voice falters.
Lochlan was grinning under the car.
“When did you get comfortable jerking off?”
“17. When I discovered what a bottom was. Stole a kink magazine from a porn store. Man, that was a lesson I didn’t get in high school. I needed to masturbate or it would hurt down there from blue balls.”
Sing swallows and licks his lips. “Daddy please let me touch myself, I’m going to go crazy.”
“How about this. When I’m doing pouring the oil, you can clean my cock with your tongue and jerk off if you want.”
“I do want. I do want a lot. How long does it take to pour oil?” Sing peers under the car.
Lochlan wiggles out and grabs for another towel to wipe his hands on. “I think I need to call Geraldo and tell him I’m under duress.”
Sing sticks his tongue out.
Lochlan sits up. “Wow you are hard in your little yoga shorts. Alright, new plan. Strip. Knee. Suck. I want you to cum at my feet.”
Sing gasps. “Oh my god.” A wet spot blooms on his shorts.
“Clothes. Off.”
“But the garage door…”
“Stays open. The car will block the view.”
“Damn Daddy,” Sing whispers. He stands up and wiggles out of his clothes. “If all mechanics were like you my car would always be up on its maintenance!”
Lochlan has a feeling if that was true, that Sing would intentionally be putting down nails in the road and running them over. But he didn’t say that. He was looking forward to Sing’s tongue bath and watching him finish himself off.  
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Captions are fictional.