Well-framed. Several concubines--one a servant belonging to one of Jacob's wives, and two or more concubines part of David's royal households, slept with the adult sons of Jacob and David. So does that mean this was part of "our biblical heritage" those in the Judeo-Christian heritage are to ensure that all household help are to sleep with any adult household members?
Or since God told Hosea to marry Gomer, a prostitute who continued to ply her trade post-nuptials, that the Judeo-Christian "heritage" is to go & marry practicing prostitutes?
Or what about Lot's adult daughters to got him drunk to become impregnated? (Is that a biblical "heritage" worth carrying on?)
Folks, when somebody says something is "biblical"--like once-mentioned Mormon baptism of dead people--the importance of reading context is relevant...because some events & practices in the Bible are negative examples (like "don't make his or her mistake") while other references are merely illustrations not to be literally carried out (like hand-chopping off).
Sidney Blumenthal, "Sid the Squid", house serpent to Hillary Clinton and her goat-footed consort, does similar drive-by magazine articles attacking conservatives from time to time.