One hot summer day, a blond came to town with her dog, tied it under the shade of a tree, and headed into a restaurant for something cold to drink.. Twenty minutes later, a policeman entered the restaurant and asked, 'Who owns the dog tied under that tree outside?' The blond said it was hers.

'Your dog seems to be in heat' the officer said. The blond replied, 'No way. She's cool 'cause she's tied up under that shade tree.' The policeman said, 'No! You don't understand. Your dog needs to be bred.'
'No way,' said the blond. 'My dog doesn't need bread. She isn't hungry 'cause I fed her this mornin.'

The exasperated policeman said, 'NO! You don't understand. Your dog wants to have sex!'
(Your gotta love this)
The blond looked at the cop and said, 'Well, go ahead. I always wanted a police dog.'