Johnny Galecki as Leonard Hofstadter
Johnny Galecki stars in The Big Bang Theory as Leonard Hofstadter, a physicist at Caltech. Leonard is the more social of his nerd friends.

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TBBT Quotes

You can't ruin a friendship with sex that's like trying to ruin ice cream with chocolate sprinkles.

Raj

Sheldon: Even the dung beetle chooses to plot its course by using the Milky Way.
Raj: Is that true?
Sheldon: Everything I say is true. Now, of course, the dung beetle also enjoys eating fece, living in feces and making little balls out of feces. So, pick and choose which aspects of its lifestyle you want to embrace.