Soft Kitty

Soft Kitty is a song that Sheldon's mother used to sing to him when he was sick as a child. Today, he still requests his caretaker to sing this song to him whenever he falls ill, though it has become more of a Penny-and-Sheldon thing, because they are the only two characters that are ever shown singing this song to one another.

Appearances
The song was first introduced in The Pancake Batter Anomaly, where Penny had to sing it to Sheldon when he caught a cold.

In The Vegas Renormalization, Penny had to sing "Soft Kitty" to Sheldon again on the pretense that "...Homesick is a type of being sick", since he had to spent the night in Penny's apartment because he locked himself out of his and Leonard's.

When Sheldon was feeling sad about being betrayed by his friends (and not being able to attend Comic Con) in The Electric Can Opener Fluctuation, Penny starts singing "Soft Kitty" in an attempt to cheer him up, but was interrupted by Sheldon as he said "That's for when I'm sick!! Sad is not sick."

In The Adhesive Duck Deficiency, when Penny was a little lightheaded from powerful painkillers she asked Sheldon to sing Soft Kitty to her. After much prompting, the two sing it as a round.

At the end of The Cruciferous Vegetable Amplification, Penny sings Soft Kitty to Sheldon after he falls down the stairs.

In The Rhinitis Revelation, Sheldon's mom, Mary, sings Soft Kitty to Sheldon after he gets sick from being in the rain.

Trivia

 * In November 2010, The Big Bang Theory held a contest where contestants uploaded their version of Soft Kitty, and other users could vote for their favorite.


 * While referred to on the show as "Soft Kitty" the actual song is called "Warm Kitty". Lyrics were written by Edith Newlin, the tune is traditional. There is also a version by Patsy Biscoe.

Video
Video:Soft KittyVideo:SoftKitty in a round

Lyrics Soft kitty, Warm kitty, Little ball of fur. Happy kitty, Sleepy kitty, Purr, purr, purr.