The Big Bang Theory

The Big Bang Theory is a very well known t.v. show about these two nerds (Sheldon & Leonard) and their various humorous interactions with this very pretty girl (Penny) living next door.
This is a link to one of their interactions:
http://www.youtube.com/watch?v=a8P0YmgQTbA&feature=related

The clip starts with Sheldon boasting about his calculations to Penny. According to him, forming a relationship is based on science basically. " Similarity" is what he is looking for - someone with the same beliefs or likings. However, Penny is completely different from him because she is completely ignorant about science and is more casual in her approach. Another point of difference is that Sheldon lives a very systematic life and calculated life. This can be seen when he talks about his seat. "Physical appearance" plays an insignificant role in his perception of a person. He is not attracted to Penny. Leonard, on the other hand is more casual and is attracted to Penny. For him science plays an insignificant role when building a relationship. He wants to impress Penny by boasting about his accomplishments as a scientist. He has a tendency to form relationships with those who are different from him combined with physical appearance of that person. He is open to differences unlike Sheldon.
In this clip we can see how the two geeks have their separate ways of building relationships and how different they are from Penny. Later in the series, Sheldon and Penny mostly dislike each other. Leonard and Penny maintain a healthy friendly relation.