Sheldon watched Penny bounce on her feet as she celebrated another victory. Her movements appealed to him. They had eaten Chinese from an unapproved restaurant, and he had enjoyed it. They had played Halo for an hour, and he had enjoyed it as well. He enjoyed everything with Penny. She bounced over toward him and spun around on one foot.
"I feel fantastic, Sheldon." She smiled down at him. "This is the best night I've had in ages."
"It has been quite entertaining." He looked up at her flushed cheeks and sparkling eyes. "I don't want it to end."
"Wanna go to a movie at an nonapproved theatre?" Penny waggled her brow.
"I see no reason to go crazy." Sheldon rubbed his hand along the arm of the couch. "I want to do something I've never done."
"Like what?" Penny bent and put controller on the coffee table.
"I suppose it is too late to go sky diving." Sheldon scrunched up his face. "I think we should engage in coitus."
She stilled, and their gazes locked.
"You're kidding, right?" Penny swallowed another swig of his favorite chocolate beverage and set the plastic bottle down haphazardly, half off the coaster.
"No. I did not say bazinga." Sheldon rubbed his hands along his thighs. "I want to understand why most people seem to think it is more important than physics."
"You shouldn't have sex for the first time because you're curious." Penny plopped down in the arm chair and smiled at him. "You don't even like to be touched."
"You touch me all the time. It doesn't repulse me."
"Just what every girl wants to hear." Penny pushed up and began to pace between the chair and his desk. "I'm not repulsive."
"No. I said your touch does not repulse me." Sheldon blushed. "Your symmetrical features and well proportioned body are empirically attractive. Your hip to waist ratio is perfect. Any fool can observe that. Your body is scientifically beautiful. I can show you the equations."
"There's math to prove I'm pretty?" Penny stopped in front of Sheldon and cocked her head to the side.
"Of course there is. Try to overcome your cornhusker mistrust of science."
"It doesn't matter. You don't like me." Penny crossed her arms over her chest. "I won't have sex with someone that doesn't like me."
"Of course I like you. You are a formidable prankstress, a fine video game player, and you listen to me. You sing soft kitty to me and you took me to Disneyland." Sheldon glared up at her. "I think you may be my best friend."
"You have a girlfriend. You two are the super couple. Remember." Penny nodded her head apparently agreeing with her own statement. "I'm not some man stealing, evil bitch."
"I will terminate my relationship agreement with Amy immediately." Sheldon pulled out his phone.
"You can't end a relationship with a text message." Penny shook her head.
"It is one of three acceptable methods outlined in the relationship agreement. I could also use semaphore or a telephone call. Neither of us wanted to be burdened by the emotional upheaval of having a physical confrontation." Sheldon smiled widely. "And Amy included the codicil that designated the opportunity to have coitus with you as a viable causation for the immediate termination of the relationship agreement."
"She did?" Penny blinked rapidly before shaking her head.
"She did." Sheldon nodded and quickly texted Amy before Penny could object again.
"You ended your relationship." Penny stood before him with a baffled look on her face. "For me? But I'm not smart enough for you."
"No one is." Sheldon sighed. "However, you have helped me amongst the fools many times. You appreciate me as I am, and I must admit I respect your ability to navigate through varied social strata. I have solved the problem of my availability, but you are still involved with Leonard despite your obvious incompatibility."
Penny blinked and fastened her gaze on her engagement ring.
"I'll be right back." Penny held up one finger before she darted down the hall. She reappeared a few minutes later without the ring.
"I left Leonard a note and returned his ring." Penny nibbled on her lip. "I don't want to marry him. It just seemed like the right thing to do."
"So, we are both single and willing?" Sheldon locked his gaze with hers again. "Are we in a socially acceptable place to continue?"
Penny nodded. A frission of excitment ran down his spine. He reached out to her, and she placed her delicate hand in his. Her skin was soft and he felt no urge to disenfect either of their hands. Pulling her onto his lap seemed the most natural thing he had ever done. Her legs curled on the outside of his. Her torso was just inches from his own. He raised his free hand up and cupped her cheek.
"Are you sure, Sheldon?" Penny stroked her fingers down his arms.
"I want coitus with you, Penny." He pulled her lips down to his and pressed his lips against hers gently. The sensation of her soft flesh against his made him giddy. She pulled away and ran her fingers through his hair.
"That was nice." Penny stroked his hair again. "Are you sure about this?"
"I don't know what to do. I never imagined wanting to participate in sexual activity." His hands trembled as they rested on her shoulders. "But I want you."
"It's not complicated, Sheldon. You're going to enjoy it and do what your instincts tell you to do. Clear?"
He nodded. Penny leaned her forehead against his. Her breath flashed hot across his face. He licked his lips and pulled her down, fusing their lips together. She pressed her soft curves against him and opened her mouth slightly under his. He clenched his fists against her hips and pressed his tongue into this undiscovered country.