Why does Penny spoil Sheldon?

Sheldon, the smell of children inspired Penny's desire for protection. In The Big Bang Theory, Sheldon is young and always smells like a child, which inspires Penny's desire for protection, so Penny always dotes on Sheldon. The Big Bang Theory is a TV comedy produced by CBS, which was created by Chuck Lorre and Bill Pradie, directed by Mark Cendrowski and starring Jim Parsons, Johnny Galecki, Kaley Cuoco, simon helberg, Kunal Nayyar, Melissa Rauch, Mam Bellick, Kevin Sussman and Laura Spencer.