Heh heh, I’ve never seen that one.
My favorite bumper sticker is “My karma just ran over your dogma.”
Saw it on an old beater Karmann Ghia in the early ‘80s.
My favorite bumper sticker, from thirty years ago, was on a beat up, rusted pickup outside an oyster shucking house:
“Orgasm Donor”
I always liked that one, too. Another good one: "Honk if you love peace and quiet!"