The Long Distance Dissonance - S10-E24
Continuity mistake: After the 'Ramona' conversation between Sheldon and Penny ends, Sheldon leaves Penny alone on the couch. Penny looks up to the "Amy and Penny" painting and says "Don't look at me like that, I tried." In S10 E10, Amy gave the painting back to Penny, which was hung in Leonard's living room.
Suggested correction: Sheldon is probably joking when he tells Mary his chest hair filled in the previous year.
Sheldon doesn't make jokes.
Ssiscool ★
He doesn't understand sarcasm, hence, doesn't know when to be sarcastic.
ckbyers
If Sheldon didn't make jokes, the term "Bazinga" would have never came into play. Ever.
ckbyers
And nearly all instances of Bazinga are not used in a funny circumstance. Indicating poor judgement and lack of knowledge regarding jokes.
Ssiscool ★
They were funny to him. And to the audience.
lionhead
Google "how many times has Sheldon said "Bazinga" " - and it'll explain that he does, indeed - joke.
ckbyers