Only because they are passionate about each other. Enjoy Chapter 4. I dont own TBBT. Plus did my research on the diamond because it fit Leonard and his love of his job.

Chapter 4

He was a very smart man. He loved science. Most importantly he loved being an expermental physicist. She sat there after asking how his day was. Even though she not might not understood what he was saying. Penny Hofstadter sat there and listened.

Passion, he had passion about what he loved to do. "Diamond is a potentially important power device material due to its excellent physical and electronic properties." His voice was full of excitment on something about what she now known as her favorite mineral.

"Development on a non-plasma high-speed anisotropic etching process using a thermochemical reaction between nickel and diamond in high-temperature water vapor. So tomorrow I am going to show my grad students this process..." Penny noticed he was frowning at her. "I'm sorry Penny, I know sometimes this is boring to you...Lets talk about your day?"

Penny smiled at him but she did not want him to stop talking about it. He just loved what he did. "No...Leonard this is something new and you're happy about this new development. Please?" She now smiled with hope.

Leonard smiled back as he took her hand into hers. "Penny...only if you are sure?" He watched her nod so he continued.

Penny could not help herself be proud of him. He was such a passionate man of his work, his friends, and her. Penny thoughts became interrupted.

"Penny, I know I am excited about this. But to be honest I am more excited to know if you finally received that position in Public Relations?"

Penny beamed with pride. He was excited for her. She will never know how lucky she was to land a guy like him. Penny leaned closer to him, with hands still linked together. "I owned them! The position is mine!"

Leonard got up to his feet and pulled her to hers. Then embraced her into a hug. "That's my girl. I knew you would get it. You are smart and beautiful. Plus I have faith in you." Right there Penny loved that man. He was smart and yes a little cheesy on the romantic side. He was passionate about his work, his friends, and her. But to her she was passionate about him because without Leonard Hofstadter, she would not be where she would be today.