I was taking a lecture on laughing. I saw a YouTuber’s eyes that hit a fact

(1)It’s also a part of IDOL Aviation Department
(2)How to smile prettily 5

(1)Let’s smile in a cool and pretty way!
(2)You can think of it as training your cheekbones

(1)Let’s smile in a cool and pretty way!
(2)Yeah, I can’t talk. I’ll just bite the card

(1)Guyan Channel
(2)Let’s smile cool and pretty!
(3)You have to read that it helps you train your cheek muscles

(1)Let’s smile in a cool and pretty way!
(2)It’s not a practice, but my parents are close to genetic factors