The woman in question, a cute blonde as it happens, was
pulled over for speeding by a California Highway Patrol
motorcycle officer. When he walked up to her window and
opened his ticket book she said:

"I bet you're going to sell me a ticket to the Highway Patrolmen's Ball."

He replied, "No, highway patrolmen don't have balls."

There followed a moment of silence while she just smiled.
He then closed his book, got back on his motorcycle, and
rode away down the highway.