Sundry
I once tore open a watermelon using a car key and my bare hands. Everything is possible if you want a watermelon.

But watermelong should be enjoyed on the shell. Sprinkled with salt.

unknown rebel
Knowing Japan it probably isn't.

Scynne
What's with you saltfags? Srop ruining good watermelon!
I've met several people who do that, and it creeps me out.
They're all from America. Is it an American custom?

megaspy2000
north american, i believe. cantaloupe, watermelon. my wife does it

Mister Yuck
I'm from America and I'm hearing about it for the first time. Sounds disgusting.