I've finde one more!!!
The little sweet storry of a clever duck!
A duck went into a and ask: "Do you have carrots?"
The answered: "No I havn't, this is a ."
Next day the duck returned and ask again for carrots. The parmacyseller saied again: "This is a , we havn't carrots and if you ever ask again I'll nail you on the floor."
When the duck returned next day it ask at first: "Do you have nails"
The seller cryed: "NO THIS IS A "
... : "Do you have carrots"