Sheldon is a nice guy. But he can also be a very demanding friend toward Leonard, as evidenced here.
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They're back together! All seems right in the world when Penny is dating Leonard, don't you agree?
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Amy lends her assistance to Sheldon in this scene. The guy needs help with a new project.
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It's a romantic evening for two on the 100th episode of The Big Bang Theory. We're very jealous of Leonard.
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The men of The Big Bang Theory do their thing in this shot from the sitcom. It's courtesy of the episode "The Shiny Trinket Maneuver."
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Leonard needs some advice in this Big Bang Theory scene. He has come face to face with his high school bully.
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This is awkward for Sheldon, as Amy gets asked out by Stuart right in front of him.
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Can Leonard and Penny hang out alone? That's their goal in this Big Bang Theory scene.
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TBBT Quotes

Mrs. Cooper: Shelly! I'm so glad you're here!
Sheldon: I saw you having naked sex.

Penny: I give up, he's impossible
Sheldon: I can't be impossible, I exist. I believe what you meant to say is, "I give up, he's improbable."