Santa beard provides cover...

...so Batman can smile incognito.

Natalie's response:  "Because it's the holidays."

Batman wears his smile at night

Natalie's response: "It's an angry smile, plus he wants to punch Robin in the face."

Batwoman smiles

Maybe she could give Batman some positive attitude lessons.

Natalie's response:  "Because she's not Batman. She probably smiles all the time!"

Batman smiles at all his wonderful toys

Natalie's response: He's smiling "Because that's the eighties."

Batman smiles...

...because Bane told a funny.

Natalie's response:  "Because he knows he wants to punch Bane in the face and kill him, make him weak!"

Batman smiles...

...when he lifts purple clad criminal masterminds right up over his head!

Natalie's response:  "Because he's doing a good job."

Batman smiles when he reads the Gotham Gazette Police Blotter

"Between the hours of 1am and 5am, over seventy individuals of varying degrees of felony and misdemeanor violation status were discovered unconscious throughout the city. Commissioner Gordon could not be reached for comment."

Natalie's response:  "He knows he's going to fight criminals. It's in the paper."

Batman smiled for his Facebook profile pic

Natalie's response: "You have to have a bigger picture."

Catwoman makes Batman smile

Natalie's response: "Because he knows he has back-up for fighting Bane."

Batman smiles when he's hopped up on Venom

Natalie's response: "Because he got infected with umm, the Joker's evil poison."

Batman smiles when he's your Huckleberry

Natalie's response: "Show me the video."

Batman's smile is just a cover...

...of Life Magazine, that is.

Natalie's response:  "Because he thinks he's flying."

Batman smiles when he's designed by Bruce Timm

Natalie's response: "Because he knows he's wearing a diaper."

Batman smiles when he holds the Bat-Radia

Natalie's response: "Because he found the radar...whatever he's saying, the 'Bat (then she pointed at the word 'Radia.')"

Batman smiles when he's being a Richard...

...Grayson, that is.

Natalie's response: "That's a mad smile because...I don't know."