On the American and the British dramas, which I see very often, they hire a nanny for their kids. I can’t know what these hired nannies exactly do to the kids by dramas. Don’t know how familiar the parents and the nanny are each other, or these nannies should have any certificate, and more than anything, are kids really OK leaving alone ( not alone exactly but ) at night when parents go to a dinner party? Is it a real thing? What kind of people hire a nanny? Do nannies really exist??