In the Amazon there's a kind of catfish that swims up your dick and attaches barbs to your urethra. The only way to avoid dying from your bladder exploding is to have your dick amputated. https://en.wikipedia.org/wiki/Candiru Well, it turns out there is only one modern account and it's very suspect. But then again, how many men are gonna risk taking a piss in the Amazon after hearing of this? They could just pee from above the water.