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A programmer puts two glasses on his bedside table before going to sleep. A full one, in case he gets thirsty, and an empty one, in case he doesn’t. :P

lol that's like the mathematician joke:

"I heard chances of there being a bomb on a plane is 1 in a million, so I decided to bring my own bomb on a place. What are the chances of there being 2 bombs on the same plane?"

hahaha funny!

how do you make holy water?
you boil the hell out of it !