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After the guys make fun of Leonard because of his lactose intolerance, Bernadette announces that her dissertation has been accepted, earning her a Ph.D. and a well-paid job, Leonard then mocks Howard for being the only non-doctor in their group. Later, Bernadette decides to buy Howard an expensive Rolex watch as a present and tells him to "let her worry about the money", a comment that disturbs Howard. Meanwhile, Leonard's and Priya's noisy sexual encounters sends Raj to spend the night at Sheldon's apartment. When Leonard finds him in his bed, he proposes that Raj moves in with Sheldon until Priya finds her own place. Raj likes to the idea, signs Sheldon's roommate paperwork and moves in with him. He then prepares a fancy dinner for them which delights Sheldon who decide Raj is a much better roommate...


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