Ah, scripture.

"The nakedness of your son's daughter or your daughter's daughter, their nakedness you shall not uncover; for their nakedness is yours." (Lev. 18:10)

Taken literally, this would mean no giving your toddler grandkids a bath.

I don't think that that was intended. (oh oh, relativist!)

Lev. 18 is just a minefield of once-understood cultural contexts that are no longer well connoted by the translations.