I have never seen my partner cry. Maybe because he is a man and there is a saying that men don't cry. Perhaps, that's why he's never cried. But he has been down a couple of times and I have had to pet him like a baby due to business set backs. But he's a strong man and he never really gets drowned by those external forces.
My wife cried after giving birth to my second child. The cry is not a sad cry, but a very happy cry.