According to Dutch tradition, Black Pete is Santa Claus' spy
who checks to see if kids have been naughty or nice. Always on the
lookout for his traditional gold lamé outfit, kids became wary of
his presence... so Pete had to go undercover. Who'd suspect a baby?
...especially a baby with a bundle of switches behind his back for whipping the bad kids?
This is one bit of politically incorrect Christmas lore that hasn't made it in the States.