There are two statues in a  park : 

One of a nude man and one of a nude woman.  They had been facing each other across a pathway for a hundred years, when one day an angel  comes down from the sky and, with a single  gesture, brings the two to life.

The angel tells them, 'As a reward for being so  patient through a hundred blazing summers and  dismal winters, you have been given life for  thirty minutes to do what you've wished to do  the most.'

He looks at her, she looks at him, and they go  running behind the shrubbery.
 
The angel waits patiently as the bushes rustle  and giggling ensues. After fifteen minutes, the  two return, out of breath and laughing.

The angel tells them, 'Um, you have fifteen minutes left, would you care to do it again?'
 
He asks her 'Shall we?' 

She  eagerly replies, 'Oh, yes, let's! But let's  change positions. This time, I 'll hold the  pigeon down and you shit on its head.'