Peeing on Mom.
When I was 12 or so, my mom stepped on a sea urchin and was in a lot of pain. My dad said the only cure was for someone to pee on her foot…unfortunately, he didn’t have to go. So he enlisted his best friend, and I got to watch him relieve himself on the moms, after which she seemed to feel much better…about a month later, the subject of the pee-cure came up somehow in conversation, and he hastened to clarify that it was a myth and didn’t work.
Which means he was so freaked out by the whole experience that he researched it, pre-internet, or he actually wanted his friend to pee on his wife. I’m going to stop thinking about this right now.