There once was a boy called billy and his struck his crotch and knocked his willy, for this he was quite silly, lest did he know his willy was gone.

He went to the market and sang a song, to his surprise his was high, so he said goodbye to the market men and went home to investigate. 

Alas his willy was gone, oh how silly he'd been to not have checked, thus now was no longer a man with a willy but her name was now sally.