In□an□c□ltu□esandsocieties,in□estis□on□□deredta□ooandisstr□ctl□□o□bidd□n.The□deaofr□ma□t□c□rs□xual□□lationship□betweensib□□ngsismetwithshock,disgu□t,andmoraloutrage.Thetab I□manycult□re□andsocieties,in□estisc□nsi□eredtabooandi□strictlyforbidden.Theideao□romanticorsexual□e□at□□nshipsbe□weensiblingsismetw□thshock,□i□gust,andmoral□u□r□ge.Thetab I□m□ny□ult□res□nd□ocieties,inces□□sconsid□redtabooandisstrictl□forbidde□.Theideao□romanticorsexua□re□□□ion□□i□sbetweensiblingsismetwithshock,disgu□t,a□□mo□aloutrage.□he□□b Inmanycult□res□□dsocie□i□s□ince□tisco□sidered□abooandisstrict□yforbidden.T□eidea□fr□□ant□□or□exualrelatio□ship□betweensibl□□□□ismetwithsh□□k,disgust,□n□moraloutrage.□hetab