Am I a real penguin ?

"A baby penguin at the South Pole goes to it's Mum and says:
'Am I a real penguin' ?
'Course you are,' says its Mum. 'I'm a penguin, your Dad's a penguin, so you're a penguin too!'
Baby penguin isn't convinced, so he goes to his Dad:
'Am I a real penguin' ?
'Don't be stupid - course you are,' says its Dad. But he can see the look of worry in his baby's eyes, and tries to explain. 'I'm a penguin, your Mum's a penguin, so you're a penguin too! That's how it works. but why are you asking?
And baby penguin looks up at his dad with his big dark eyes and says:
'Cos I'm f***ing freezing.'"
link