The Closet Reconfiguration - S6-E19
Question: Assuming I've got the right episode, when Howard took Sheldon home, why didn't he just tell Sheldon not to tell anyone what was in the letter? If he had, Sheldon would have told the girls that Howard told him not to say.
Answer: Sheldon is extremely bad at keeping a secret. He actually doesn't want to keep a secret and tries to find or create a justification to tell it so the pressure will be off him.
lionhead