A little boy was walking home with his mum when he saw two dogs going at it over on the other side of the street.

"Mummy, what are those dogs doing?" he asked.

"The brown dog has hurt his paw and the other dog is giving him a piggy back home," replied the quick thinking mum.

"That would be about right," said her son. "Give someone a hand and they go and fuck you up the arse".