It was bath time again within the Dalmatian family household. Working together, Dylan and Dolly were getting their siblings cleaned up one by one and making good time doing it. Dolly rounded up the other pups while Dylan took on the task of actually washing them. He was more than happy to do so, feeling a sense of satisfaction from watching his siblings walk away with clean and soft fur while also smelling nice from the fragrant soap. 

As he washed each of his siblings Dylan kept track of those who had yet to be cleaned and as the number ticked down it eventually came down to Diesel again. The neat and tidy dalmatian remembered the last time he tried to bathe his younger brother. Not only was he the dirtiest pup among the bunch but he also wasn’t eager to wash off the dirt and smells that were already clinging to his pelt. 

Dolly brought Diesel into the bathroom and promptly shut the door. Dylan had heard their voices beforehand so it was safe to assume that the younger canine had to be dragged into the bathroom again. Diesel huffed but then smiled when he turned around and saw Dylan. 

“Hey, Dylan!” he greeted. 

”Hey, Diesel,” Dylan greeted back but with less enthusiasm. “Come on. You know what day it is. Can we please do this without any trouble. The sooner you get into the bath the sooner you can get dirty again.” 

Diesel nodded and started to approach but not the bath. He stepped closer to his older brother and began sniffing. It was obvious that he caught onto a scent and Dylan felt his heartbeat quicken. When his brother ducked his head down low, Dylan was quick to jump back. 

”Diesel! No! We’re not doing this again,” Dylan protested but Diesel wasn’t listening. He stepped forwards to get close to Dylan again and he was already sniffing. That talented nose was quick to discern where his brother had been and what he had recently done. 

“You were with Hansel again! This morning!” Diesel exclaimed, a wide grin now being on his face. 

“Diesel! Hush!” Dylan said. He hoped that Dolly wasn’t still near the door. 

”It's okay. I won’t tell anyone,” Diesel said. “But I’ve started feeling funny after what we did before the last bath. When we licked each other down there.” 

“Yes. I remember.” 

”When I think about it I get this funny feeling and it slides out,” Diesel explained. “I tried to make it feel good like last time but I don’t think I’m doing it right…” 

“You didn’t let anyone else see you, did you?” Dylan asked with concern. 

“No. But… Can you help me with it?” Diesel asked with a pleading tone and look. 

”Will you get in the bath if I do?” Dylan asked and Diesel was quick to nod and bounce in place. 

“Okay, Diesel…” He mentally prepared himself to give a lesson on male canine anatomy. 

Dylan reached out and pressed his paw to the younger dalmatian’s crotch. Diesel sat with his legs spread to show off his sheath and balls. He began to slowly knead it and a small noise came from Diesel. After a bit of squirming his cock finally came into view. Dylan rubbed the sensitive flesh directly and that kept the erection sliding out until all of it was out of the sheath, including the knot. Dylan was again reminded that Diesel was rather big down there for someone of his age. 

“This is how you're supposed to do it,” Dylan said as he began to rub it with his paw. He slid it up and down slowly, curling his paw against the flesh. Going from the tip down the knot and back up again, he could feel Diesel’s size and it throbbing from his size. Diesel responded with a small moan and he began to rock his hips against the moving paw. He was starting to understand now and was enjoying how it felt. 

“Our penises are usually tucked into sheaths for protection but the tip slides out when you need to pee or if we get aroused. You get the urge to pleasure yourself or…share pleasure with someone else. Sometimes all it will come out of the sheath and other times you will need to rub yourself to make all of it come out.” Dylan explained as he was still gently rubbing Diesel’s cock. 

“And when it's fully out you can do things with it. For instance I’m rubbing yours. When you do it yourself it's called masturbating. But it's something you can only do when you’re alone. You can’t just go showing this to anybody.” 

”I know that, Dylan,” Diesel giggled before he moaned again. The more that Dylan rubbed him, the more that Diesel reacted. He could feel the pleasure building and it was his natural reaction to squirm from the building tingly feeling. Dylan began to rub him a bit faster and the young dalmatian couldn’t help but hump against his moving paw. 

“Easy, Diesel…” Dylan soothed. 

“It just feels really good…” Diesel said. He looked down at his cock and noticed that something was leaking out. The younger pup suddenly looked worried, the same expression would appear on his face when he failed to make it outside when he had to go. 

“Don’t worry, Diesel. This isn’t pee. Its precum,” Dylan educated. 

“What?” Diesel asked, obviously confused. Dylan chuckled and explained the substance, where it came from and how it was typically used to serve as added lubrication. True to his words, getting his paw wet with the precum made it easier for Dylan to rub Diesel’s cock and the pleasure was increased on the other dalmatian’s end.

More precum had started to leak from the tip and it got smeared onto Dylan’s paw as it came sliding up and then back down. 

“D-does this stuff help when you’re with Hansel?” Diesel asked. 

“Y-yes,” Dylan admitted with a blush. “Wait! How do you-” 

”I can smell him all over your back. He was on top of you!” Diesel deduced. 

Dylan blushed. It was true that he woke up extra early to let Hansel in and they had sex in his treehouse. He had cleaned himself up after and hoped that the scent was washed off. But Diesel’s sense of smell was nearly supernatural. Wanting to distract his younger brother from the conversation, Dylan began to rub father. 

Diesel moaned and began rocking his hips faster too. He could feel the pleasure climbing even higher. His cock was throbbing hard and there was something happening or maybe about to happen? “Ah, Dylan! I remember this! It feels so good!”

“You’re about to cum. Or ejaculate. When you get enough pleasure you release your seed. Be careful when you're with a girl because putting your seed inside of them can get them pregnant. That’s where pups come from. And if you have to raise a pup of your own you won’t have any time to do your digging,” Dylan warned. 

”Ah! I-I’ll be careful!” Diesel promised. He could feel that feeling building until there was a sudden burst of intense pleasure. His body locked up and from his cock came a few ropes of pearly cum. Dylan stopped moving his paw and the seed had gotten all over it.

“And this is your cum,” Dylan said. He showed it to his brother before turning around to wash the seed from his paw. He wasn’t the biggest fan of the sticky stuff being on his body, the exception being Hansel’s…

“Masturbating feels good but you have to clean up when you're done. And when you’re with someone else it’s a good idea to get cleaned up after that too.” 

”So, I can…cum inside of someone? Has Hansel done that to you?” Diesel asked curiously. 

“Well, yes. But-” 

”I wanna try!” the overeager and still muddy pup threw himself at his brother. 

Dylan was unprepared for Diesel throwing himself at him. The young dalmatian crashed into him and they tumbled a bit. Diesel was quick to get back up and he saw his chance to mount his still dazed sibling. 

He climbed on top and began to thrust his still erect cock against Dylan’s backside. The older pup felt it and felt heat coming to his face. “D-Diesel! W-wait a minute!” His body was being rocked by Diesel wildly humping against him. He could feel the cock grinding, bumping, and poking around without actually finding anything.

Diesel didn’t want to wait. He wanted more pleasure and he wanted to experience mating and putting his seed inside of someone else. As soon as he was on top of Dylan there was just this urge that had taken over. His cock finally found Dylan’s rump and the bigger dalmatian gulped as he felt the first poke to his tailhole. 

“I think I found it!” Diesel exclaimed, sounding proud of himself. He felt his cock sliding over the other dog’s soft hole. With the surface still being wet with his precum and some of his cum, the next thrust led to him finally penetrating. A gasp came from Diesel as he felt the warmth and tightness of Dylan’s tailhole. 

Dylan felt it being pushed inside of him. Diesel’s motions were inexperienced and a bit rough. As soon as Diesel found his mark, he pushed himself in full force. It was luck for Dylan that had been mounted and mated by Hansel earlier that day. He was still somewhat loose and was able to endure the sudden and harsh entry.  

“Oh, Diesel!” As his younger brother began humping, Dylan felt waves of pleasure being forced into him. Diesel was going fast and hard with no signs of slowing down or easing up. Dylan was still lying on the floor with the younger pup clinging to him and humping him madly. He knew that the responsible thing would be to stop Diesel and make him take a bath but Dylan had his flaws and weaknesses. As he felt the younger pup’s generous size rubbing along his walls. 

“Oh! Ooah! This is what it feels like! Oh, I dig this a lot!” Diesel said. His voice was strained as he continued humping into the soft hole. His length was slipping in and out of the deeper parts of Dylan’s ass. Being unaware of the many intricacies of mating, Diesel was surprised to feel his brother’s hole squeezing down on his cock. He pushed past these squeezes and earned more pleasure as a result. 

“Y-you’re doing a good job, Diesel,” Dylan said. He gave up on trying to control the situation and figured he may as well enjoy himself. Maybe this was the best way for Diesel to learn? Dylan knew he was just trying to convince himself but perhaps the rapid stroking of his walls was enough. 

He could feel Diesel’s furry balls smacking into him and there was warmth on his neck from Diesel panting nonstop. To Dylan’s surprise and delight, his younger brother was going even faster and harder. 

”Urrgh! Y-yeah! Oh, I dig this so much!” Diesel was muttering to himself, completely lost in the pleasures of burying his cock in a different kind of hole. He could tell that Dylan was enjoying himself and that made him happy. 

Dylan had done his best to endure the fast pace and many strikes to his prostate but there was only so much that he could take. After a few more of these he raised his voice and came on the bathroom floor. Erection swelled further and released ropes of seed that were much thicker than Diesel’s. He was left panting as well and from his orgasm came the rhythmic squeezing of his ass. 

This was a surprise for Diesel, one that he took head on. But thrusting against those squeezes brought him all the closer to his orgasm. And with the approach of this he felt another instinctual urge coming over him. He thrust harder but was noticeably pushing his knot against Dylan’s hole now. The older pup was at first too dazed by his own climax to realize but he came to and gasped. 

”Diesel! W-wait! Don’t kn-” His warning was cut short by him groaning from another hump that led to the very thing he was just about to tell Diesel not to do. The other pup’s knot was pushed in and lodged in deep. Diesel finally stopped thrusting and instead sighed deeply as began cumming, releasing more small ropes of his hot and sticky seed. 

“Oh… D-Dylan… That was the best thing ever…” Diesel said. He lied on top of his brother with his tongue lolling, experiencing a rather satisfying afterglow. 

“Glad I could help…” Dylan said. With the knot being pushed in so deep and it still being fully engorged the two were going to be tied together for some time. At least Diesel was the last to be bathed. He then got an idea and got up, telling Diesel to hold onto him. As Dylan approached the bath the younger pup tried to get away but found he was stuck. 

”A deal’s a deal, Diesel. Look at it this way. We get to take a bath together!” Dylan said with a smirk and chuckle.