I first saw this on in Sherman’s book, where she notes that one source learned it in New York in the 40s, another in Florida in the 1960s. Wonder if it’s still around!
Did you ever see Sally make water?
She pisses a beautifull stream
she can piss a mile and a quater
she’s a regular pissing machine
The 1960s version changed the last line to “you can’t see her ass for the steam.” It’s not noted in the book, but I suspect that this is was sung to the tune of My Bonnie Lies Over the Ocean”, which inspired dozens of parodies.