I am oversensitive

[robvalue]

Animals certainly do need to hide it. It's a sad fact that can mean a pet can be suffering and hide it from their owner, to the point where getting them help is too late once it becomes critical.

As far as I know, crying (emotionally) is unique to humans. I'd be interested to know if that's wrong. I don't know much about the processes involved. Maybe a way of showing your emotions much more clearly has been an evolutionary benefit to us.