I got this joke from a friend in my e-mail.
A man is lying in bed in the hospital with an oxygen mask over his mouth. A young nurse appears to sponge his hands and feet.
"Nurse," he mumbles from behind the mask, "Are my testicles black?"
Embarrassed, the young nurse replies, "I don't know, I'm only here to wash your hands and feet."
He struggles again to ask, "Nurse, are my testicles black?"
Finally she pulls back the covers, raises his gown, holds his penis in one hand and his testicles in her other hand and takes a close look, and says, "There's nothing wrong with them!"
Finally, the man pulls off his oxygen mask and replies,
"That was very nice but, are... my... test...results...back?"