Right from the start, human beings are taught that there is one thing that will get us what we want: tears. Babies use it to get food, toddlers use it to get toys, young girls use it to get money from their fathers, middle-aged men use it to get victories from their football teams...
There are sad tears, happy tears, tears of frustration.
Tears for fears.
Blood, toil, tears, and sweat. Or just blood, sweat and tears.
Tears in heaven.
Personally, though, I'll do my crying in the rain.