What episodes does Sheldon sing ‘Soft Kitty’?
When Penny was a little lightheaded from the powerful pain medication and a muscle relaxer that the hospital gave her after she dislocate...
‘Soft Kitty‘ is a nursery rhyme that Sheldon's mother used to sing to Sheldon when he was sick as a child. Being an adult, he still requests his caregivers to sing “Soft kitty, warm kitty” to him whenever he feels sick. In some episodes, Sheldon also sings it to others who have fallen ill. The song is called ‘Soft Kitty‘, and parts of its lyrics sequence have been altered for the version sung in The Big Bang Theory.