Regulus sat up in bed.
Something felt wrong, but he couldn't place it.
He got out of bed to go drink water when he realized it.
Regulus's privates were pointy.
It stuck out of his pants, and it kinda hurt.
Regulus poked it, and a wave of tingles were sent down his spine.
Regulus sat back down in bed, completely forgetting about his thirst.
He spent the next 5 minutes poking and rubbing and prodding his hardened privates.
He felt so many tingles that he decided he wanted to take off his underpants.
He took off his underpants and nearly wet himself with shock.
His privates had grown about 3 times it's length, and it had some sticky fluid coming from the top.
The 12 year old had no idea what was happening, and he was beginning to get scared.
What had happened to his boy parts?
He could go call Kreacher... But then Kreacher would tell Mother and he didn't want that.
No, Regulus decided, he should go to Siri.
Siri always knew what to do, even if he wasn't sure.
Regulus pulled his pants back up, and he waddled awkwardly to Sirius's bedroom across the hall.
He peeked his head around the corner of the door.
Sirius was sleeping.
Regulus tip-toed forward until he reached the bed.
His privates accidentally brushed against the bed post and Regulus moaned.
Sirius stirred, awakened by the noise.
"Reggie?" Sirius mumbled. "What're you doing?"
"Siri, my privates hurt." The 12 year old whimpered.
At the word "Hurt" Sirius sat up straight.
He looked down at the boy with his legs crossed.
Sirius would have laughed if he didn't know any better.
He invited Regulus onto the bed, and Regulus gratefully climbed onto the little pile of pillows, desperate to relieve the feeling.
He started rocking his hips up and down on top of the pillows to generate friction.
Sirius gently placed his hand just above Regulus's prick to stop the motion and the boy in question shivered.
"Siri, help me." He whined.
Sirius smiled.
"Reg, do you know what's happening?" Sirius asked him, wanting him to understand.
"No," He responded impatiently. Didn't Siri understand that his privates felt like they were going to explode?
"Okay, so you are 12 now," Sirius explained, "Which means you're going through puberty. Your body is changing, and in result, little things like that will happen from time to time. It's called an "erection". Every boy gets it at least 3 times in his life."
Regulus nodded desperately.
"How do you... un-erect it?"
Sirius laughed.
"I'll show you how, love, don't worry. You're going to have to take your pants off, though."
Regulus scrambled out of his pants, brushing his cock with his hands in the process, causing more of the sticky stuff to come out.
Sirius's eyes widened at how far along Regulus was.
"Okay, Reggie, this is going to feel good,I promise." Regulus nodded, just desperate for it to go away.
Sirius wrapped his hand around the boy's cock.
Regulus moaned and shivered.
Sirius started slow, sliding his hand up and down to smear the pre-come all over his shaft.
"What I'm about to do is called a hand job. If you ever do it to yourself, you'd be masturbating, got it?"
Regulus nodded and whimpered.
Sirius slowly started picking up the pace.
Within minutes he was grunting to keep it up, and Regulus was thrusting into Sirius's hand.
Eventually, Regulus couldn't see and he felt a big knot in his abdomen come undone.
Sirius sensed he was going to climax and covered his mouth.
Regulus screamed as his cum shot out and landed on Sirius.
"Thanks Siri," Regulus whispered tiredly.
"No problem, Reg. Whenever you need help, you can always come to me." Sirius smiled, carrying the boy back to his bedroom.