Well plenty of posts, but the 4th has been a joke-free zone. So:

A bloke is seriously ill in a hospital bed, wired up to all sorts of machines and wearing an oxygen mask.

A young nurse pops her head round the door to make sure he's ok, but. he waves his hand to her and calls her in. He asks her, "Please can you tell me if my testicles are black?"

She's somewhat taken aback and she replies that that isn't part of her duties. "Please, nurse, I'm desperate to know!"

Reluctantly she folds back his bedsheets and gently takes down his pj bottoms. Carefully, she eases his "old man" to one side and caresses his testicles.

"Well, everything's fine down there," she reassures him, and replaces his sheets and pj bottoms.

He takes off his oxygen mask momentarily and says, "Thank you, nurse, that was just lovely. But now can you tell me if my test results are back?"