Irish diabetic

The Irish diabetic
One day an Irishman goes into a pharmacy - reaches into his pocket and
takes out a small Irish whiskey bottle and a teaspoon.
He pours from the bottle onto the teaspoon and offers it to the chemist.
"Could you taste this for me, please?"
The chemist takes the teaspoon, puts it in his mouth, swills the liquid
around and swallows it.
"Does that taste sweet to you?" asks Paddy.
"No, not at all," says the chemist.
"Oh that's a relief," says Paddy. "The doctor told me to come here and
get my urine tested for sugar."