A Tennessee restaurant is 'snipping' their prices by offering diners a free milkshake if they can hand over proof of vasectomy – and it's bringing all the 'boys to the yard.' Daddy's Dogs, a hot dog restaurant in Nashville, Tennessee, put a sign up advertising their 'Snip for Shake Deal' throughout the month of July and some diners wondered whether it was a joke. 'Putting it in writing for those who still don't think it's real,' restaurant owner Sean Porter - who is also known as 'Dr. Big Daddy' - wrote on Instagram alongside a photo of the sign. 'Dr....