The man asks how his father is settling in.
“Oh, it’s wonderful son, I’ve made some great friends, I’m well rested and at night the nurses give us a hot chocolate and a viagra before bed every night”.
When, leaving, curious to know about the viagra, he asks a nurse.
“Excuse me, my dad told me that you serve him hot chocolate and a viagra before bed every night, why?”
The nurse replies, “Oh, the hot chocolate is to help them fall asleep.”
“And the viagra is to stop them rolling out of bed”