全集
Inmanyc□ltu□esa□dsocieties,in□estisconsidered□abooandi□stri□t□□forb□dden.Theideao□ro□anticorsex□alrelati□nshipsbetweensibli□gsi□□etwith□□oc□,disgust,□ndmoralou□rage.Th□tab <□>Inmanyculturesand□o□□□tie□,□ncestisc□nsid□□edtabooa□disstrictlyfor□idden.Th□□d□aofromantico□s□□ualrelatio□shipsbetwee□sib□ingsismetwithsh□ck,□isgus□,andmo□□□o□trage.Thetab<□p□ Inmanycu□t□re□andsoci□ties,□nce□tisco□sideredtabooandisst□ictlyforbi□den.□h□ideaofromantic□rsexual□elation□hi□s□et□eens□blingsismet□iths□ock,disgus□,□ndmor□□o□trage.Thet□b