Maybe if Juan said: "It's me, Juan! ... From the Papaya tree! ... Back in the jungle! ...Long time no see. What have you been up to?! Still eating papayas like there's no tomorrow?"
Steve: "Actually, I was in the papaya tree and got shot by a blow dart and I've been in this lab ever since."
Juan: "But I bet you're still eating papayas like there's no tomorrow, tho', am I right or am I right?"
Steve: "Actually, they're feeding me some kind of experimental papaya today, so chances are there won't be a tomorrow...what about you? What have you been up to?"
Actually that kind of changes the joke though. Maybe it will give you some idea or something.
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Peeing sitting down is the gift you give yourself.