The next morning, Dean searched the bunker, but he couldn't find his angel anywhere. He was starting to get worried when he heard water running in one of the rooms.

Followed by laughter.

And that is how Dean Winchester discovered Cas, sitting, fully clothed, in a bathtub, letting the shower water fall all over him.

The angel was positively SOAKED.

"Cas?" Dean questioned, taking in the scene.

"Hello Dean!" He replied cheerfully. "Join me!"

"Um...What exactly are you doing?"

"I'm appreciating the wonders of water, Dean. Join me, and embrace H2O in all its glory."

"....Cas, you realize that most people don't wear clothes when they're in the shower, right?"

" Of course. I've seen you shower many times. I just like my clothes, that's all." DEan froze at the comment.

"You've watched me in the shower?"

"Yes." Cas looked over at the hunter. "And I assure you, there are much easier ways to get my pants off then telling me I have to be naked in the bathtub." Dean opened his mouth to respond, but failed, ending up gaping at the angel.

And Cas hadn't been entirely wrong about Dean's motives, either.

The hunter finally shook it off and sat on the edge of the bathtub as Cas splashed in the water and giggled.

"You are such a five-year old," He teased, grabbing a towel.

"And that's bad why?" Cas tilted his head and Dean fought back the urge to hug the angel tight and tell him how much of an adorable little precious puppy he was. 

"I don't know." He stammered, handing Cas the towel. "You go find some dry clothes. Is there anything else on the list you wanted to check off today?"

"Swimming." 

"Okay, that's easy enough." Cas shook his head.

"Night swimming, Dean. In the dark."

"....Got it." He thought for a moment. "I know a spot. But for now, let's get you dry and go watch Star Wars until it gets dark, okay?"

"Star Wars, YES!" Cas yelled, running out of the bathroom, his soaking wet shoes leaving slippery footprints behind him. Dean shook his head.

"Oh Cas. What are we gonna do with you?"

************

That night, the pair drove out to an old lake, with a single, unstable looking dock still standing. They walked to the edge of the dock, and Dean looked out at the dark lake with a smile. 

But then Cas started stripping off his clothes, tossing his trench coat on the dock behind them. Dean's eyes widened.

"What?" Cas finally asked, removing his pants. "You said I can't wear clothes in the water."

"That's for-" Dean stopped, his breath hitching as Cas became fully naked before him and then jumped into the lake with a splash.

"Come on Dean!" The hunter stared, and then his brain realized what he was being offered.

And he'd have to be pretty stupid to turn down the offer of skinny-dipping with Cas at midnight.

So he stripped, Cas's eyes watching him the whole time, and he cannon-balled into the lake, splashing the angel.

Cas let out a shriek and shoved a laughing Dean.

The two of them swam together for hours, splashing and playing games, and occasionally even kissing.

As dawn approached, they treaded water, directly across from each other.

"You know, Cas," Dean admitted. "This list is a lot of fun." The angel smiled.

"I thought you'd like it." He agreed, coming closer and wrapping his arms around the hunter. Dean grinned and closed the distance, sealing Cas in a long, seductive kiss.

"The sun will be rising soon." The angel whispered.

"We've still got a few hours," Dean objected, not wanting to leave. He wanted to stay right there for the rest of eternity.

"...Maybe we should dry off," Cas suggested. "Warm ourselves up." He added, winking,

Dean glanced at the old rickety dock and grimaced before looking back at Cas.

"The backseat of the Impala is quite warm." He hinted. Cas grinned and shoved Dean into the water before frantically heading for land.

"CAS!" Dean yelled out in fury before chasing after the angel. 

They were still completely naked, and damp from the lake by the time they reached the Impala. But neither of them cared as Cas pinned Dean to the seat and kissed him.

It was noon by the time they left the car to retrieve their clothes.