Summary: Perry and Doofenshmirtz become stuck together after Phineas and Ferb create the world's stickiest glue.

Stick with Me

*Backyard*

"Hey, fellas," Heinz greeted the boys as he walked up to them, carrying a large box. "Whatcha doin'?"

Isabella, who was next to Phineas, cleared her throat. Why did everyone always have to use her catchphrase?

Heinz took notice of her. "Oh, hello. What are you doin'?"

"Stop that!"

"Stop what? What am I doin'?"

"Oh, forget it."

"What should I be forgettin'?"

"Ugh!"

Phineas was as oblivious as ever as he said, "This is Isabella. She-"

Heinz perked up. "Oh, it's nice finally meet you. Phineas speaks very highly of you. And, Ferb... Well, Ferb doesn't talk much. I'm Dr. Heinz Doofenshmirtz."

"So, you're this 'Dr. D' I've heard about?" Isabella asked, still mad about the man using her catchphrase so much.

"Yep. And, you're Phineas' girlfriend."

Phineas and Isabella glanced at each other and blushed at the comment. "Uh," Phineas stammered, "we-we're not dating."

Heinz smirked and rolled his eyes. "Whatever you say... So, I bet you're wondering what's in this box." Ferb opened his mouth, then closed it when the doctor said, "Well, I'll tell you, since you didn't ask. I-it's nothing much. Just some parts from previous inators. I was going to throw them away, but then I thought, 'Hey, why not recycle them?' So, I made an old-inators-inator, but it exploded when I turned it on. So, I figured you fellas could use these parts for something."

Phineas grinned as Heinz set down the box. "Thanks!" Perry popped out of it. "Oh, there you are, Perry."

Heinz was confused. "How'd you get in there?" Perry chattered. Heinz shrugged. "Whatever that means. So, fellas, whatcha makin'?"

Isabella had had enough of him using her catchphrase. "Ugh! That's it! Isabella Garcia-Shapiro is out! Peace!" She stormed off, leaving behind a puzzled Heinz.

"I don't think I want to know. So, whatcha makin'?"

"Why can't you take hint!?" came from off-screen.

Phineas took no notice. He held up a red tube. "Ferb, Isabella, and I created the world's stickiest glue. We call it 'Ferb Glue.'"

Heinz asked, "Why'd you name it after Ferb?"

"I name a lot of stuff after Ferb. Anyway, we have to be careful. Even a single drop of Ferb Glue will instantly stick any -and I mean any - two things together."

Heinz grabbed the tube. "Gimme! I want to glue back together my dry-cleaning-wheel (Candace Gets Busted). I brought it with me, for some reason. I also have no idea why I even own it." He felt around his lab coat. "Now where's-" Ferb pointed at the two halves of a wheel by the fence. "Oh, there it is. It broke off while I was fighting-" He remembered that Perry didn't know his owners knew his secret identity. "Uh, my nemesis. I was fighting my unnamed nemesis." He walked towards the parts, only to trip. Upon falling, he accidentally squeezed the tube, and a glob of glue sprung out of it and landed on the back of his head. He stood up. "Oh, man. N-now I got that glue on my head."

"Careful, Dr. D," Phineas warned. "Anything that touches the back of your head is gonna stay there."

Heinz waved him off. "Relax. I'll be careful." He walked closer to the wheel-parts, only to slip on a puddle and fall backwards. His head landed on the back of a certain platypus... Heinz shakily stood up. "Oh, why is my head so heavy?"

Phineas and Ferb knew how bad the situation was. "Uh-oh," Phineas said.

Heinz didn't like the sound of that. "Uh-oh? W-what does 'uh-oh' mean?"

"It means Perry's stuck to the back of your head!"

"Oh... What!? Well, what are you waiting for!? Get him off!"

"We don't know how."

"You don't know how!? It's your glue!"

"We designed it to stick things together." Phineas gave a reassuring smile. "Don't worry, though. Ferb and I will figure out a way to safely get you guys un-stuck."

Heinz nodded. "Alright. Maybe I can go back home and figure out something, myself."

"Good idea. We'll call each other if one of us figures anything out."

"Sounds good." With that, he left.

Perry couldn't believe what was happening. He was stuck. To Heinz Doofenshmirtz. As soon as they were a safe distance from the house, Perry started crying softly.

Heinz took notice and smiled sympathetically. "Aw, don't cry, Perry the Platypus. Look on the bright side. Of all the people you could have gotten stuck to, you got stuck to me."

Perry began bawling.

*Doofenshmirtz Evil Incorporated*

"Okay, Doc," Perry said, "you're the scientist. Do you know of any way to remove glue?"

Heinz became nervous. "N-no, but..."

"But what?"

"I... I have to use bathroom..."

An awkward silence followed.

Norm came by and broke it. "MOM, WHY ARE YOU ON THE BACK OF DAD'S HEAD?"

"We're not your parents!" Heinz exclaimed. Perry just rolled his eyes. "Now could you go do something somewhere else?"

Norm walked off-screen. "THERE IS LEMONADE IN THE KITCHEN."

"Don't say lemonade!"

"Well, now I have to go," Perry said in annoyance.

*Backyard*

Phineas and Ferb stood at a white table that was covered in beakers and test tubes full of chemicals. They were wearing lab coats and safety goggles.

"Hello, friends," Baljeet greeted as Buford carried him over his shoulder.

"Whatcha doin'?" Buford asked.

Isabella shouted, "Oh, come on!" from off-screen.

"We made the world's stickiest glue," Phineas explained, "and, long story short, Perry got stuck to the back of Dr. D's head."

"Dr. D?" Baljeet asked. "You mean the inventor you two mentioned?"

Buford put Baljeet down and scoffed, "If he's so smart, how'd he get a platypus stuck to his head?"

"The author can make anything happen," Ferb said.

Phineas agreed, "Yes. Yes, she can. Anyway, we're trying to make a skin-safe solvent to get them un-stuck."

Baljeet was delighted. "Oh, I would love to assist in mixing chemicals!"

Buford looked from his nerd to Phineas and Ferb. "If you guys are gonna do nothin' but nerd-stuff, you can count me out. Peace." He gave Baljeet a wedgy and left.

Phineas turned to Baljeet. "Well, you're just in time for the song. Ferb?"

Ferb, dressed like he was in Kick It Up a Notch, began playing a guitar that appeared out of nowhere.

*D.E.I.*

"Where's that music coming from?" Heinz asked.

"I think Ferb's gonna sing about us," Perry answered.

"Oh, okay."

(This song is a parody of Outta My Head by Daughtry. Ferb's voice sounds like Chris Daughtry.)

I thought it would be easy

But ain't for us.

It's kinda hard, when you're stuck to someone, not to make a fuss.

I really thought by now

You'd slip off my head.

But the glue binding me and you something that rhymes with head.

Crazy how things happen

When you don't want them to.

I will lose my mind

If I stay stuck to you.

Oh, curse that glue...

Ain't no doubt about it.

I can live without it.

We are glued together.

I can't get you off of my head!

Just when I think you're gone

I can't seem to rhyme in this song.

I don't want you around

But I can't get you off of my head!

*Backyard*

Phineas and Baljeet clapped, and Ferb bowed. "Great song, Ferb," Phineas commented.

*D.E.I.*

"Hey," Perry pointed to a small, stationary device, "what's that?"

Heinz turned around. "That? That's just my un-stuck-inator. I used it to get gum out of my hair. Long story."

Perry had a blank expression. His nemesis could be so stupid. "Doc?"

"Yeah?"

"You have an inator that gets things off of things."

"Yeah?"

"It gets things off of things."

"Yeah?"

Perry facepalmed. "For the love of shrimp! Use the inator to-"

"Why would I use my un-stuck-inator? It's not like I need-"

"Blah, blah, blah, you're dumb. Just blast us!"

"But-" Heinz finally understood. "Oh... In my defense, the-the way you phrased that made it hard to figure out."

"A kindergartener could have figured it out!"

*Backyard*

Baljeet grinned while pouring a blue liquid into a green liquid, the mixture turning yellow. "Oh, I love this! Finally, a chance to express my intelligence for a worthy cause!"

Phineas' phone vibrated, and he answered it. "Hello?... Hi, Dr. D... Really? That's awesome!... I'd be bouncing off the walls, too! In excitement... Oh, you guys are literally bouncing off the walls?"

*D.E.I.*

"Yes," Heinz said on the phone as he to the curtain with his free hand, his legs bouncing on the ground, slowly coming to a halt. "Yes, we are."

Perry flew out of nowhere and clung on to the same curtain. "Well, at least we're not stuck together anymore."

The End

This is why you never play with glue. Especially Ferb Glue.