mum

A little boy called Graham asked his Mum: ‘Mum, may I take Fluff for a walk around the block?’ Mum replies, ‘No, because she is in heat.’
‘What’s that mean?’ asked little Graham.
‘Go ask your father. I think he’s in the garage.’
Graham goes to the garage and says, ‘Dad, may I take Fluff for a walk around the block? I asked Mum, but she said the dog was in heat, and to come to you.’