The whole idea of posting animal pictures before and after being called ‘a good boy’ started out of the blue. As one user posted randomly a photo of his dog with the same expression written above it, others followed. People really liked the idea and started a trend of pet pictures posted, focusing on their face expression and how it changes when they hear the magic words.
#1 Can a dog be happier than this one after being told that he is ‘a good boy’?
#2 While cats on the other side, get pissed off when they here those three words.