5.: The Hamburger Postulate

: After feeling that his chances with Penny are slim, Leonard begins a brief sexual relationship with his fellow scientist, Leslie Winkle (played by Sara Gilbert).

: Sheldon is deeply unsettled by Leonard’s new relationship, as it disrupts his established routines, including his specific hamburger-related habits at the Cheesecake Factory. Key Themes and Analysis 5. The Hamburger Postulate

: Sheldon’s reaction to Leonard’s "unauthorized" guests and changes to their dining schedule serves as an early example of his need for environmental control. : After feeling that his chances with Penny