Big Bang Theory Quote 11473

Quote from Sheldon in the episode The Propagation Proposition

Leonard: Uh, do you remember Penny's ex-boyfriend Zack?
Sheldon: Leonard, I remember all of Penny's ex-boyfriends. If you'd like, I could list them alphabetically.
Leonard: No, thank you.
Sheldon: Fun fact. You would think Zack would be the last one on the list, but she also dated two Zekes.

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