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The average body temperature is 37°C, but the normal body temperature can range between 36.1°C and 37.2°C or more. Your body temperature can vary depending on how active you are or the time of day.
Jason, after his resurrection, has a lower body temperature than the average person. He doesn't know why, but he theorizes that his body never fully recovered from his death.
One might think the Lazarus Pit would've healed this, but it turns out the glow-stick pool from hell doesn't really heal everything. Jason's still very visible y-incision scar on his chest is a huge testament to that. As do the scars on his fingertips, from the night he clawed his way out of his coffin. As do the many other scars on his body from both his time in the streets and the Joker's torture.
Anyway, Jason was colder than most. This is why he wears layers and layers of clothes. Why he always wears his signature brown leather jacket, and why he never lends it to anyone.
So Dick, Damian, and Stephanie were all confused when Tim popped into the Cave for their patrol reports wearing Jason's leather jacket. Hood wasn't in Gotham tonight, and was in another country with Roy and Kori for a mission.
"Dude, Jason's gonna kill you when he comes back," Stephanie told Tim, gesturing to the article of clothing.
"I tried stealing it from him once, and he almost punched the living daylights out of me. Why'd you get to wear it?" Dick asked, a slight pout on his face. Damian eyed the jacket warily.
"What? No, this isn't Jason's jacket. It's mine," Tim replied.
"Have you hit your head landing on a rooftop, Drake? That is clearly Todd's jacket. Or would you like to convince us that you have also picked up Todd's smoking habit?" Damian gestured to the hem of the jacket, where a cigarette burn was seen.
"That could've been from anywhere, demon brat," Tim glared at Damian. "Anyway, it's mine. Not Jason's," Tim added.
"If we see your body floating in Gotham Bay, we hold no responsibility," Stephanie murmured, still looking at the cigarette burn.
Dick clapped his hands, catching the attention of everyone. "Hood's jacket or not, we're getting distracted. We're here for updates on patrol, not on Red's outfit. Let's start with Robin."
Damian started his report, and so did the others following him.
While others were preoccupied, Tim let out a small conspiratorial smile. He couldn't wait to tell his boyfriend about what happened.
--
On the rooftop of one of Jason's safehouses, sat two lovebirds catching up from their time away from each other.
"No fucking shit, really?" Jason asked, disbelief evident in his voice. He was smiling, amused at everything Tim had told him.
"Yes! Oh my God, what did you do to Dick that made him so pouty and shit when he saw me wearing it, anyway?" Tim replied, taking a fry from their shared meal.
"Eh, it's more of his fault? I don't like people stealing my things. He said it himself, he tried to steal it. I caught him, and I was kind of shivering, so I wanted it back and I was in no mood to argue," Jason replied, drinking a small sip of beer.
"I'm glad I'm the only one with that privilege," Tim said jokingly.
"Yeah, well, they're not my boyfriend, are they?" Jason replied.
Tim just hummed and continued to eat in silence as Jason started recounting something he, Kori, and Roy had done to escape some pursuers. He shuffled closer to Jason, snaking an arm around his waist and holding the other close. He laid his head on Jason's chest, the rumble of it while Jason talked grounding him.
"Woah, miss me that much, baby bird?" Jason asked, grinning. Tim gave his partner a playful glare and hugged him even tighter.
"Of course not, I'm just cold."
Jason just laughed and continued his story. They stayed like this for a while, Tim hugging Jason as if he were to disappear.
"Love you, Jay," Tim murmured, head still on Jason's chest.
The older smiled, leaning a bit downwards to place a kiss on Tim's head. "Love you too, Timmy."