Our money's on Chuck Berry.
The St. Peters location of the St. Louis Frozen Custard Factory closed recently, and it looks like someone's been messing with their sign.
The sign now hilariously reads: "Put your P N me."
We can only assume the culprit is some urophile, but "P" could also be an abbreviation. We'll let you guess what it's short for.
See also: Famous St. Louisan News: Andy Cohen Made Perfume From Lady Gaga's Pee
St. Louis Frozen Custard Factory is still going strong in Rock Hill, where it's been open since 1998. Don't worry; there's nothing naughty on its sign.
Follow Lindsay Toler on Twitter at @StLouisLindsay. E-mail the author at Lindsay.Toler@RiverfrontTimes.com.