Sheldon: [through virtual presence device] Sing me Soft Kitty.
Penny: Really, you want me to sing Soft Kitty to a computer monitor?
Sheldon: Would you rather come over and sing it to me in person?
Penny: [sings] Soft kitty, warm kitty, little ball of fur.
Sheldon: Closer to the microphone.
Penny: Happy kitty, sleepy…
Sheldon: No. You have to start over.
Penny: [sings] Soft kitty, warm kitty, little ball of fur. Happy kitty, sleepy kitty, purr, purr, purr.