It was Halloween and three vampires went into a saloon and bellied up to the bar. ‘What will you have?’ the bartender asked.
‘I’ll have a glass of blood,’ the first replied.
‘I’ll have a glass of blood, too, please,’ said the second.
‘I’ll have a glass of plasma,’ said the third.
‘OK, let me get this straight,’ the bartender said. ‘That’ll be two bloods and a blood light?’