Gracie: So you got spanked as a kid? Dad: A few times... but it hurt my Papi more than it hurt me. Gracie: Why? Did he regret losing control? Dad: No... Dad: I'd put a board down my pants.
I recall an old Audrey comic strip where a boy Audrey knows, named Melvin, puts a board down his pants; he shows it to her before his father spanks him, but whether or not he got spanked with it shielding his buttocks, he DID get splinters in his buttocks from it! Melvin tells Audrey about it at the end.