A man goes to visit his 85-year-old grandfather in the hospital. “How are you, Grandpa?” he asks.

“Feeling fine,” says the old man.

“What’s the food like?”

“Terrific, wonderful menus.”

“And the nursing?” asks the young man.

“Couldn’t be better.”

“What about sleeping? Do you sleep okay?”

“No problem at all,” says the grandfather. “Nine hours solid every night. At 10 o’clock, they bring me a cup of hot chocolate and a Viagra tablet, and that’s it. I go out like a light.”

The grandson is puzzled and a little alarmed by this, so he rushes off to question the nurse in charge. “What are you people doing?” he asks. “I’m told you’re giving an 85-year-old Viagra on a daily basis. Surely that can’t be true?”

“Oh, yes,” replies the nurse. “Every night at 10 o’clock, we give him a cup of chocolate and a Viagra tablet. It works wonderfully well. The chocolate makes him sleep, and the Viagra keeps him from rolling out of bed.”