A proton walks into a bar and asks for a drink. The bartender says "For you? No charge."
Two atoms are walking down the street.
Says one atom to the other, "Hey! I think I lost an electron!"
The other says, "Are you sure??"
"Yes, I'm positive!"
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A duck walks into a pet food store. The assistant says "Hi there, what can I do for you?" The duck says "Have you got any duck food?" The assistant says "No. We're sorry, we don't sell that, you might want to try the store across the road." The duck walks out.
Three days later, the duck goes back to the store and says "Hi, have you any duck food?" The assistant says "No, I told you earlier this week, we have no duck food, we don't sell it." The duck walks out.
A week later, the duck returns to the store and says "Hey, do you have any duck food?" The assistant says "No, and if you come back in here again, I will nail your feet to the floor." Teh duck walks out.
A week after that, the duck goes back to the store and says "Hey, do you have any nails?" The assistant, slightly confused, looks at the duck strangely and says "No, why??"
The duck says...................
.............(wait for it)
"Have you got any duck food?"
(I'm sorry!)