Beating your papaya

So I have this little reference book on herbs and I'm writing PANTHER, my WIP. Rashid and Jillian are journeying to the deep desert to find the lost treasure and need herbs when he gets injured.

The book I bought is from Jamaica. No problem, mon. I just need ideas.

I'm skimming along and come to the myths and legends page. And I see this: PAPAYA: "It is believed that if a young man beats his penis on the trunk of a papaya tree it will grow to a large size when he gets older."

WTF?

Now I finally understand why there are so many papaya trees in Jamaica. No wonder they call it a woodie...