snakegay:

please just like get this thru your heads when consuming internet animal content. there is NO other animal that moves its mouth into a smile to indicate happiness in the same way human beings do. 

even to chimpanzees, which are our closest living relatives, a standard human smile is an indicator of aggression in their body language. on that note, for MOST animals opening your mouth and showing teeth in a way we would consider a “smile” is an act of fear or aggression. 

do not assume that an animal “smiling” means that it is happy or safe. a single photo of an animal “smiling” is not necessarily  a red flag but content that wholly relies on the notion of “aww look it’s smiling” is very much suspicious