No serious joke (and there's yet another oxymoron) page about the English language could be complete without a collection of puns. Here are a few.
A neutron goes into a bar and asks the bartender, "How much for a beer?" The bartender replies, "For you, no charge."
Two atoms are walking down the street and they run in to each other. One says to the other, "Are you all right?"
"No, I lost an electron!"
"Are you sure?"
"Yeah, I'm positive!"
A group of chess enthusiasts had checked into a hotel, and were standing in the lobby discussing their recent tournament victories. After about an hour, the manager came out of the office and asked them to disperse.
"But why?" they asked, as they moved off.
"Because," he said, "I can't stand chess nuts boasting in an open foyer."
There was a man who entered a local paper's pun contest. He sent in ten different puns, in the hope that at least one of the puns would win.
Unfortunately, no pun in ten did.