Well, whatever the reason, the celebutante turned fashion designer is begging all her fellow lovely ladies to not reveal so much while reveling on All Hallow's Eve.
"Girls, can we all pledge that we will not dress slutty for this Halloween?" Richie wrote on her Facebook page Thursday. "The jig is up."
Of course, Harlow and Sparrow's mom is clearly someone who practices what she preaches given her conservative family-friendly Toy Story outfit last year.
Absolutely adorable. Proving that sometimes more is more.