On This Day (CW: gross picture) about the myth of the fish that swims up a human’s urine stream into the urethra that
the Straight Dope fell for:
In other words: that’s upstream, and this isn’t an Atlantic salmon leaping waterfalls to return to its breeding grounds. Also, even if the urethra is dilated because you’ve been putting it off for too long and are now pissing like a horse, this fish’s head is over a centimetre wide. It’s not getting in there, and even if it tries, you’re going to see the little bastard coming. I suspect the Straight Dope report either jumped the gun or didn’t get its facts right, and that the scientists investigated Dr. Samad’s case and… were not altogether convinced.