Paddy goes into a Doctor's surgery, reaches into his pocket and takes out a small bottle and a teaspoon. He pours some liquid onto the teaspoon and offers it to the receptionist. "Could you taste this, please? The receptionist takes the teaspoon. puts it in her mouth, swirls the liquid round and swallows it. "Does it taste sweet?" asks Paddy. "No not at all". says the receptionist. "Good" says Paddy. "The doctor told me to come back here and get my urine tested for sugar!"