Say cheese. 說 cheese!

Say cheese. 說 cheese!
拍照時的常用句。怎解？

When you saying cheese, usually, your lips would appear smile look, so it is suitable for taking picture.
Just like: 四萬咁口.

This is another way to ask people to smile. Same use as Say Eeeeeeee

應該不是cheese吧
是cheer..
叫係笑起來..開心點

Say cheese時,你的嘴型是E起棚牙笑的,
即係「1、2、3、笑!」的意思