"How old is she now?" C.K. asked Fallon, referring to his daughter, Winnie. "Nine-and-a-half months," Fallon responded.
"Yeah, so you don't have to do anything. Nothing," C.K. advised. "She's still at an age where if you leave her in a room she'll still be there a few minutes later."
C.K. is the proud father of two girls, so Fallon can probably count on getting advice from him for a long time.
C.K.'s show, Louie, began its fourth season on FX May 5.