Both Kim Kardashian and her husband Kanye West take a lot of photos – it kind of comes with the territory – but one theme is that they both rarely smile.

The Keeping Up with the Kardashians star and mother to 1-year-old North West is clarifying the reason why she never smiles in photos and it’s because she’s afraid of getting wrinkles.

Kardashian posted photos of herself with friend Shamari Maurice from her family’s Christmas Eve party, where they opted to get a photo booth instead of doing the annual Kardashian Christmas card, where she was actually seen smiling.

“See I do smile... even laugh on occasion. Not too often though because it causes wrinkles,” she captioned the photo.

Last month, Kardashian talked about opting out of the Christmas card this year, admitting they “ran out of time.”

“We're a little confused this year because we ran out of time, I think this is the first year that we're not doing our card,” she said. “We're kind of sad, we just couldn't get it together. And where is everyone? Y'know, this one doesn't want to be in it, this one does want to be in it, so who knows."

image via Twitter from Kim Kardashian

image via Kristin Callahan/ACE/INFphoto.com