A  little girl asks her mum, 'Mum, can I take the dog for a walk  around the block?' 
Her mum replies 'No, because she is on  heat.' 
'What does that mean?' asked the child. 
'Go and  ask your father. I think he's in the garage.' 
The little  girl goes out to the garage and says, 'Dad, can I take Lulu  for a walk around the block? I asked Mum, but she said the dog  was on the heat, and to come ask you.' 
He took a rag,  soaked it in petrol, and scrubbed the dog's backside with it  to disguise the scent, and said 'Ok, you can go now, but keep  Lulu on the leash and only go one time around the block.'  
The little girl left and returned a few minutes later with  no dog on the leash.. 
Surprised, Dad asked, 'Where's  Lulu?' 
You'll love this!!!!!!!!!)................  


The  little girl said, 'She ran out of petrol about halfway round  the block, so another dog is pushing her  home.'