Star went up to her room to get cleaned up while Marco waited in the living room. Alright, how was he going to pull this off? "Just be honest." He whispered to himself. It shouldn't be that bad, right? Star went through mewberty right in front of him, and it was a lot uglier than what he was going through. Star told him about mewberty, it's only fair that she learn how humans go through the big change. "You can do this. You can do this. You can do this!" He whispered to himself.

After a good half hour, Star finally revealed herself. She slowly snuck her way down the stairs and leaned over the banister. "Marco!" She whispered loudly as her hand beckoned him. Marco simply complied, getting up from the couch where he sat and walking over to the stealth-mode princess. Star immediately grabbed him by the wrist and sprinted to her room as quickly as she could. Star threw her friend onto the bed before slamming the door behind them.

Marco lifted his face from the comforter. "Would you please stop dragging me… every….where…?" His voice shriveled as he took in his surroundings. Star had certainly made some… changes, since he'd been here last. The once colorful walls were now covered in thick, grey, metal plating. The windows were bolted shut with the same material. And what looked like… mounted turret guns were placed in all corners of the room.

"Staaaaaar? What is going on?" Marco asked. Star took one more peek into the hallway before shutting the door again. She then pointed her wand at the door and yelled, "Heavy Armor Safety Plate!" With a flash of light and a beam of magic, a giant metal plate poofed into existence where the door once was. "Staaaaaaaar?!" He repeated.

The princess turned to him with a beaming grin on her face. "Soundproof armor plating!" She boasted, before poofing two large arm chairs and a coffee table into the center of the room and taking a seat. "Now no one can else can possibly hear your Earth secret!" Star crossed her legs and tossed her wand into the air, clearly very proud of herself. Marco couldn't help but giggle at this whole situation. Maybe it was a bit overboard, but this was star he was talking about. He honestly should have expected something like this. As unsettling as the bunker-esqe scenery was, Star did go through all this trouble just to make him feel safe.

Marco stood from the bed and walked over to her. "How did you do all this?" He said, still taking in the atmosphere. Star lugged her book of spells onto the coffee table between them and flipped to a page sloppily labeled: Fortification and Defense.

"Ta-da!"

Seeing the book, only one thing crossed Marco's mind. "No no no. I am NOT talking about this kind of stuff in front of Glossaryck!"

"Re-lax! He's back in Mewni right now reporting my progress to my parents." Star locked eyes with her bestie and rested her chin in her hands. "Right now, it's just you and me."

Despite the literal live weaponry surrounding the two, Marco felt oddly calm when he heard those words. "You and me?" He asked.

"You and me." her eyes sparkled like stars in the night sky.

Marco took a deep breath. He could do this. He just had to be honest, be straight with her. "Do you know what sex is, Star?"

This question seemed to catch her off guard. "Uhhhh." She stuttered, face turning a light shade of pink and immediacy breaking eye contact. Star stayed silent for a few seconds before finding her voice again. "I mean, I think I do… my mother never really thought it was something a princess should be worrying about, and my father tried to give me the talk once, but he ended up fainting a couple minutes into it. So, I ended up having to settle for the dusty, old books in the castle library. Besides, even if I know about… that kind of stuff back on Mewni…" She paused, eyes glued to the floor. "You know… it could be totally different, here on Earth." She blushed even harder. Marco was starting to feel sorry for her.

"Star, if this makes you uncomfortable, we don't have to talk about this."

Star thought back to earlier today. Whatever this was, it was really effecting Marco. If she doesn't listen, who knows how much worse he could get? "No." She said firmly, lifting her head to lock eyes with her bestie. "I said I would help you. Let's talk about this. Let's just have a normal conversation." Star then took a deep, calming breath and gave him a smile. "Just stop worrying and talk to me. We're just two friends hangin' out. Nothing to be embarrassed about."

There was just something about that girl that gave Marco strength when he needed it most. Marco closed his eyes and took a deep breath. If Star was so keen on having a conversation, maybe he could make this work. "Sooo, on Mewni, there are two genders?" Marco began. Star shot him a look of shock and confusion before answering, "Yeeeees?"

"And these two genders are attracted to one another?"

Star's confusion turned to skepticism. "Yeees."

"Men have penises?"

Star jumped in her seat a bit, her eyes agape and her face pinker than the hearts on her cheeks. She immediately looked back to the floor. "m…mm-hm" She answered, her voice, barely audible.

"And women have vaginas?"

"Marco, why are you making this about me? We're talking about your Earth problems, not Mewni."

Marco leaned back in his chair, putting his hands behind his head. "You said you wanted to have a conversation. Wouldn't be much of a conversation if I were the only one talking." He responded, a cocky smirk now painted on his face. Star shot him a dirty look. "Sooo?" he continued "Mewman women have vaginas?"

Star took another deep breath. She was here to help Marco, and that's what she was going to do! "Yes, Marco." She said through gritted teeth, "Mewman women have vaginas."

"What's the matter, Star? I thought we were just two friends hangin' out. Nothing to be embarrassed about." He teased.

If Marco was trying to start something, Star Butterfly was never one to back down from a fight. This was a battle of wits, a battle of will! Marco may have turned the tables on her, but in the game of war, when your enemy brings out the warnicorns, so do you! Star flashed Marco her own cocky smirk. "You're right, Marco. We should both be pulling our weight in this conversation." Star scooted her chair closer to the coffee table between them. "So Marco, does sex feel good on earth?" Star leaned back and put her legs up on the table in front of her. Star's voice was smooth, confident, almost seductive, in a way.

Although managing to keep his composure, hearing Star say the word 'sex' gave Marco goosebumps. Lucky, Star didn't seem to notice.

"Yep" he said gleefully, not a hint of shame in his throat.

DRAT! He was good…

"It's one of the greatest feelings a human can experience. We even do it ourselves from time to time. I assume it's the same on Mewni?" Marco was putting on a tough poker-face, but it took every ounce of his strength not to cringe himself into a little ball with every word he spoke.

Star's blush quickly returned to her face and her eyes found their way to the floor, once more. "Y-yeah…." She mumbled.

"I'm sorry?" Marco leaned forward, cupping one of his ears.

"Yes! Alright, Marco?! Mewmans self-pleasure! I self-pleasure! What does all of this have to do with what's bothering you?!" Star shouted, making Marco jump in his seat. Marco's smirk slid off of his face. He was being a bit of a jerk to her. She was just trying to help. She didn't deserve to be treated like this.

"Alright Star… I'm sorry. I'll stop teasing you… I just have one more question to ask."

Star looked off to the side, crossing her arms. "Fine" she huffed, "Let's just get this over with." Marco gave her a warm smile. "Just two friends hangin' out…" he said slowly

Star looked back to her friend. "…Nothing to be embarrassed about." She continued. The sudden, serious atmosphere made the two laugh a little.

"Well? What's your question?" she asked, a smile now on her face.

After all this time of playing cool and tough, Marco's blush finally returned to his face. "Sooo… after you went through mewberty, did you start feeling… like, different? You know, like, new… urges or… feelings for other people?" Marco's tone was now extremely quiet and shy. She knew she wasn't supposed to, but Star thought it was adorable!

"I mean… I was focusing a lot more on boys a couple months before hand, but yeah. After I got my mewberty wings, the feelings got a lot… stronger, along with some… physical urges…"

Marco could not get that image out of his head. Star Butterfly… Masturbating in his own house! He couldn't help but wonder how she did it. Did she use her fingers or did she use a toy? Has she ever stuck her wand up there? Did she use magic to get off or good old fashioned elbow grease?

Wait, No, Ew! What was he doing?! This was Star he was talking about, his best friend! He couldn't think about her like that! It was sick! Unfortunately, Marco's hormone fueled body disagreed with that statement, judging by the hardening pole between his legs becoming more and more apparent. Marco quickly crossed his legs to hide his shame. Hopefully, Star hadn't noticed.

"…I actually called my dad on the night I went through mewberty and he sent me a book on how a girl should handle it." Star paused for a few seconds. "Is that what's wrong, Marco? Did you go through mewberty?"

"Pretty much, yeah."

"Wait, really? I got it right?"

"Yeah, essentially. I mean, it's a little different on earth, but that's more or less what's going on…" Marco slowly slid his way off the chair and was now sprawled across the floor "Human's go through puberty. Other than not turning into monsters, the only major difference is that, while mewberty takes a few hours, puberty take years and years. And guess who's at the tail end of it… This guy." Marco, still on the floor, brought both of his hands up and pointed to himself with his thumbs. "And we don't get wings" He added.

"That sucks" Star teased.

"Oh shut up, you can't even use yours!" he said, taking a seat back on his chair.

Both of them laughed. It was extremely welcome after such a tense interaction. As much as Star enjoyed the moment, there was one more thing that was bothering her. "So, what does you going through… 'pewberty' have to do with this morning?"

"Hoo boy… I was hoping you'd forgot." Marco said, rubbing the back of his neck. Whatever, he came this far, might as well put her mind at peace. "Alright, since our sexual cultures are pretty much identical, I assume you know what an orgasm is."

Star nodded.

"Alright, off to a good start. Do you know what happens when a guy reaches… you know, an orgasm?" He really didn't like saying that word!

Star just stared at him.

"Basically… stuff comes out the end."

"Sooo…"

"Different stuff, Star. I didn't wet the bed."

"Alright, gotcha!" she said, nodding her head.

"When guys like me, go through the 'big change', we sometimes have dreams about… you know, what we just talked about. Aaaand we hit orgasm while we sleep… and that's what you saw" he quickly finished, blushing profusely. Star got up off of her chair and gave her bestie a big hug. "Feeling better?" she asked. "Yeah, I think so." Marco replied.

"Alright, this place is freaking me out. Can we get out of here now?"

Star turned her head to the metal plate in front of the door.

"You do know how to get rid of it, right?"

"Uuuum… Probably?"