Animals can’t create philosophies and religions, and they can’t smile. We, on the other hand, can certainly produce a lot of different philosophies and religions and we can produce a lot of different smiles.
Politicians have their special way of smiling when they want to look good on TV. Social workers have their kind of understanding and well meaning smiles, with the head bent a little. Many born again Christians produce an interesting holy looking kind of smile. Idiots have their idiotic smiles, car salesmen have their big Hollywood smiles and crooks have their nasty ones. Very cultivated and high born old ladies can smile wonderful smiles as they spread their sarcasms around.
Alcoholics have their special way of smiling. They produce a very stupid kind of smile. You can immediately see that someone is an alcoholic only by the way he smiles. Some people are not alcoholics but are filled with mendacities for other reasons. Their smiles are difficult to make out, but I have noticed that when they get older their weird smiles get more pronounced.
All this applies of course also to laughs. There are also many different ways of laughing. But not all smiles and laughs are false. There are also true smiles and true laughs, straight from the heart. These smiles and laughs are of a completely different quality. They originate from a completely different part of the brain.
There is also true religiosity, true spirituality and true philosophy. Not everything what people say (including one self) is false. And of course, there is a also a true self.