Sheldon and Amy do a scientific evaluation when she gets turned on by Zach. They determine that she's horny. He wants her to go out with Zach, but instead she tries a hand-holding experiment with Sheldon.
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We're at the vet for this scene from The Big Bang Theory. It's from the episode "The Locomotive Manipulation."
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On Valentine's Day, Sheldon kisses Amy on a vintage train ride after a disastrous dinner.
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James Earl Jones totally cracked us up on The Big Bang Theory. He guests here on Season 7.
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When he's closed out of Comic Con, Sheldon decides to create his own convention on The Big Bang Theory.
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Amy and Sheldon plan a trip to the wine country with Howard and Bernadette on The Big Bang Theory. "The Locomotive Manipulation" is the 14th episode of the show's seventh season.
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Sheldon struggles with what to do with his time off on The Big Bang Theory. "The Occupation Calibration" is the 13th episode of the show's seventh season.
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Penny serves the boys some food in this scene from The Big Bang Theory. It is from the first episode of 2014.
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Leonard does his best to console Penny on The Big Bang Theory. "The Hesitation Ramification" is the 12th episode of the show's seventh season.
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It's Christmas on The Big Bang Theory! Howard simply awfully happy about it here.
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The gang wonders what their lives would have been like if they'd never met Sheldon on The Big Bang Theory. "The Cooper Extraction" is the 11th episode of the show's seventh season.
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Sheldon must deal with the shame of having his discover disproved on The Big Bang Theory. "The Discovery Dissipation" is the tenth episode of the show's seventh season.
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TBBT Quotes

Penny: Here's a question-- as an alien pretending to be human, are you planning to engage in any post-prom mating rituals with Amy?
Sheldon: There are post-prom mating rituals?
Penny: Not always. Unless your date drives a van with an air mattress, then always.
Sheldon: Well, if it's part of the prom experience, then I'm open to it.
Penny: You're kidding.
Sheldon: I may be an alien, but I have urges.If Amy wants to copulate by firing her eggs into space, well, then, I will happily catch them with the reproductive sac on my upper flermin. I'm not the best at reading facial cues, but I can see that you're a little turned on.

Penny: Hey, Sheldon, did you change your Wi-Fi password again?
Sheldon: Yes, it's "Penny, get your own Wi-Fi." No spaces.