Sid and Irv are business partners. They make a deal that whichever one dies first will contact the living one from the afterlife.
So Irv dies. Sid doesn't hear from him for about a year, figures there is no afterlife. Then one day he gets a call. It's Irv.
"So there is an afterlife! What's it like?" Sid asks.
"Well, I sleep very late. I get up, have a big breakfast. Then I have sex, lots of sex. Then I go back sleep, but I get up for lunch, have a big lunch. Have some more sex. Take a nap. Huge dinner. More sex. Go to sleep, and wake up the next day."
"Oh, my god," says Sid "So that's what heaven is like?"
"Oh no," says Irv. "I'm not in heaven. I'm a bear in Yellowstone Park."