While Raj is upset about being along on Valentine's Day, Sheldon explains that part of the joy of being in a relationship is that it could be considered a positional good; whereby Howard's utility with Bernadette is increased by Raj not having one.
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Sheldon was told by the university that he needs to take a sexual harassment seminar online.
Raj is upset about being along on Valentine's Day. Howard, however, is happy with his girlfriend.
