During his campaign, Sheldon hugs Penny after she briefly agrees to talk to Leonard. However, Penny catches the flu just before the trip. Leonard tries to take Sheldon instead, only to find that Sheldon has also caught the flu from the hug.
Sheldon attempts various tactics to change Leonard's mind, including bribery with "Frodo-shaped pancakes," citing roommate clauses, and even presenting a PowerPoint to Penny on why she shouldn't go. [S3E15] The Large Hadron Collision
Leonard is granted a trip to Geneva to see the CERN supercollider. Although Sheldon cites their Roommate Agreement , which requires Leonard to take him if ever invited to CERN, Leonard chooses to take Penny for a romantic Valentine’s getaway. During his campaign, Sheldon hugs Penny after she
Leonard ultimately travels to Switzerland with Raj , who is thrilled to enjoy the romantic amenities—like champagne and chocolates—originally intended for Penny. Key Characters & Cast Sheldon attempts various tactics to change Leonard's mind,