"Please?" he asked.
"No."
"Pretty please?"
"Nope."
"Pretty pretty please?" This was getting ridiculous.
"The answer is still no."
"Oh come on Cait!"
"See, selflessness isn't always rewarding."

He let out a huff. So this was what he got for being a gentleman and giving Caitlin his jacket although he only had a thin shirt underneath it, and she already had three or four layers of clothing.

"Come on," he said, trying one more time to persuade her. "I gave you my jacket because you were cold. Now I'm freezing. I'm not chilly, I'm not cold, I can actually feel my insides freezing and all I'm asking is for you to give me my jacket back." At her impassive face, he went on, "Would begging help my case?"

"Well," she said playfully, "getting on your knees is certainly a sight I'd like to see."

With a sigh, he dropped dramatically to his knees in front of her and held her hand between his. He heard someone gasp on the table beside them before he realized that he looked like he was proposing to her. The thought of him and Caitlin being married made him smile a bit, but he quickly dropped her hand and joined his own as if he were praying. "Caitlin Snow," he said with his best puppy dog eyes, "would your amazing charitable heart feel pity for the cold defenseless man soliciting your kindness and warmth?"

"That was so sweet," she said. "But no."

"You said you'd give it back to me!" he exclaimed, his eyes widening.

Her expression became amused. "I just said I'd like to see you beg."

"Well you implied it."

"Oh Barry... I thought you were a scientist. You should know the difference between implying and the truth."

Alright. OK. If this was the game she was playing, he was more than ready to join her. To beat her. He stood up and leaned closely to her. The sudden closeness made her uncomfortable, and she unnoticeably slipped a little on her chair. But to Barry, it was quite noticeable. He was already winning without breaking a sweat.

"What are you doing?" Her voice slightly wavered, and Barry took that as another sign of approaching victory.

"Since you're not going to give me back my jacket, I'm gonna get as close to you as I can to maximize my heat gain," he stated simply. "See, I am a scientist."

That's when she realized that she wasn't playing alone anymore. He'd caught on quite quickly, and that was when the fun began.
The Flash needs her body heat? Yeah right. At the speed his body works, her corporal heat compared to his would be like a second for an immortal.

Now she could see how long the round would last. She held his hands in hers and stood up too before bringing her face mere inches away from his. "Is this better?" she asked, and when her hot breath tickled his cheeks and he flushed, she couldn't help the smirk that spread on her lips.

"I want to kiss you so badly right now," he said, and she was taken aback by what he'd just said because Barry Allen was never, ever so forward with his emotions. But a part of her brain - the logical one, the one that didn't let her do stupid things - lost its authority, and instincts kicked in, primal and never before manifested, and she grabbed his face and pulled it to hers and kissed him a hard, passionate, lustful kiss and God, it felt wrong and oh so right at the same time, and she couldn't stop - didn't want to - until she physically had to because her lungs ached for air.

They had both lost the game, but it didn't really matter. They'd gained something much, much better. Besides, neither of them needed a jacket anymore; the small make-out session heated thing up enough.

When they got back to her car, something navy on her white backseats caught Barry's eye. He pulled it to his lap and looked at Caitlin in disbelief. "I thought you didn't have a jacket," he said, waving the S.T.A.R. Labs piece of clothing in front of her face.

She glanced at it before nonchalantly stating, "That's a hoodie." She then pulled out of the café's parking lot, completely ignoring the look on his face and suppressing a laugh.

A few minutes before she reached his house (he couldv'e reached it way faster if he'd just run, but he liked to spend as much time as he possibly could with Caitlin), she spoke again, "I just like your clothes better. They're warmer, and they smell like you." She offered him a shy smile, and he wanted to kiss her right then and there. (But he didn't want to get them killed in a car crash.)

"What do I smell like?" he asked.

"Like a safe haven," she replied, and he kissed her right then and there. (Luckily, conveniently, they were at a red light.)