Sheldon lay on his bed, wide awake. Leonard had just asked him to pick a favorite. Amy has kissed him before; twice to be exact. But this was the first time he had initiated the kiss. It was out of mockery – at first.

Sheldon was very clear at the beginning of the relationship that he did not do physical contact. Yet, three years later, he has had more physical contact with Amy Farrah Fowler than with his own mother. He enjoyed her presence, whether or not they spoke. He's taken care of Amy when she was sick, breaking his germ boundaries, as well as physical contact. Sheldon has cuddled Amy, and spooned with her.

All of this within three years of their relationship. And now all Sheldon could think about was Amy's lips on his. Soft, warm, and the hint of brownie. His heart skipped a beat recalling the kiss. It was out of mockery, was it not? Why did he extend it? Did he enjoy it? Should he try it again, to experiment? He knew Amy wouldn't mind. But first, he needed to do research before conducting the experiment.

That meant talking with Penny. And if he were to get any sleep tonight, it would have to be at this moment. He sat up, slipped on his loafers, and wrapped his robe around him. Leonard was still awake when Sheldon walked out of his room.

"Oh, hey, Sheldon," Leonard said, looking away briefly from his laptop. Sheldon glanced over while he walked to the door, noticing that Leonard was playing Star Wars: The Old Republic. "Going to see Amy?"

"No, of course not. It's too late. I'm going to see Penny, to do research," Sheldon stated simply, walking out of the door. Once the door shut, Leonard leaned back in his chair confused. What research would Penny help him with?

Knock, knock, knock. "Penny." Knock, knock, knock. "Pen—"

"Hi, Sheldon," Penny opened the door, smiling. She was still dressed, as well. "What's up?"

"I'm sorry, are you busy?" Sheldon inquired.

"Well, Amy's here," Penny opened the door farther, exposing Amy sitting on her couch.

Sheldon and Amy's eyes locked. Sheldon's heart skipped a beat, the memory of the kiss flooded back. He watched Amy's face get red. She was blushing. Was Sheldon blushing? He couldn't tell. All he knew was he couldn't conduct research with this variable. He couldn't think straight with Amy right there.

"I'll come back tomorrow," Sheldon finally spoke. "I'm sorry for interrupting you two." And with that, he turned around and walked across the hall back to his apartment. Penny looked back at Amy and shrugged before shutting her door.

In the apartment, Leonard exited his game and turned around in his chair. "That was fast. Was Penny no help?"

"I don't know, Amy was there." Sheldon sat down in his spot, sighing. All he could think about was that kiss! He was a scientist, not some sex-crazed teenager!

"What was Penny going to help you with? Maybe I can help," Leonard offered, sitting in his chair, next to Sheldon.

"Well, you don't have as much experience as Penny," Sheldon stated. "But why not, she can't help me right now." Sheldon straightened up. "What was your first kiss with Penny like?"

"Ah, my first kiss?" Leonard looked back. "Well, depends on which first kiss… The first kiss I consider 'first' is when we returned from the North Pole. My heart stopped briefly, and then raced. That night, all I could do was replay that kiss. I had waited for it for so long, and it finally happened." By the end of the explanation, Leonard was smiling, reminiscing on good memories.

Sheldon sat there, listening. He knew for a fact that Leonard enjoyed that kiss. He remembered that conversation well; none of the guys believed him at first. But Leonard was over the moon excited. Sheldon didn't feel 'over the moon' excited, but every other factor was occurring. He couldn't stop replaying the kiss. His heart skipped a beat.

So far, research has shown Sheldon to have enjoyed the kiss. He needed to ask Penny tomorrow, though.

"Thank you, that's all I needed to know." Sheldon told Leonard, standing up. "Good night."

"Did you enjoy the kiss you and Amy shared?" Leonard questioned.

Sheldon stopped in front of the hallway, and turned around to talk. "I believe so. Again, good night, Leonard."

" 'Night, Sheldon," Leonard answered, grinning. Leonard picked up his phone and sent a text to Penny.

"Sheldon thinks he enjoyed the kiss!" That was the text that Leonard sent to Penny.

In Sheldon's room, he was back under his covers, replaying the kiss.

Amy had told Sheldon's new friend to leave, and rudely at that. Sheldon was confused, did she not say this was a trip for both of them to enjoy? He was surely enjoying himself! "What is your problem?" Sheldon questioned.

"It's Valentine's Day! We're supposed to be having a romantic weekend!" Amy waved briefly over their now empty dinner table. Howard and Bernadette reminded her several times that evening that she was never going to get that intimate with Sheldon, and it stung.

"Oh, really?" Sheldon felt anger rising. "Because I remember you saying that this trip was going to be something that we both could enjoy. Did you mean that? Or were you just trying to trick me?"

"Fine! It's true!" Amy admitted. "I… Deserve romance! And I didn't know how else to make it happen…"

Sheldon got annoyed. Amy did try tricking him! "Well, if you want romance, then let's have romance."

Sheldon looked around quickly, and saw the wine. "Oh look, there's wine! Mm…"Sheldon leaned over, snagging Amy's glass (since his was water), and took a sip. He briefly gagged. "Grape juice that burns." He set down the glass.

"Ah… Now let's gaze into each other's eyes!" He leaned down, eyes wide and lined up with Amy's. "You blinked, I win!"

"Sheldon…"

"Let's see, what's next… Oh, kissing's romantic!"

And with that, he bent down and pressed his lips against hers, to mock her. He was sure she wasn't going to enjoy it – Sheldon knew that he wasn't going to. Immediately, his heart began to race and instincts took over. He moved closer to Amy, so close that only a mere inch or so separated them. He deepened the kiss and his hands moved to her hips. A few more moments, and they separated.

Silence between them. Both were trying to find the right words to say to each other. Amy finally found the strength to speak. "That was nice," she said softly.

"Good," Sheldon responded, tender. He was no longer angry at her.

Sheldon found himself smiling when the memory stopped playing. He wasn't ready to admit it, but with each replay of that kiss, the more Sheldon found himself thinking he did enjoy it. That he may want to experience it again with Amy. He never thought he would ever enjoy kissing someone. To exchange saliva and bacteria… But he never felt the urge to wash out his mouth after kissing Amy. He just wanted Amy to stay by his side.