Izwe selijwayele ukuthi abanye bakhangwa abesilisa, abanye ngabesifazane, kanti abanye bobubili ubulili. Nakuba inketho yokugcina cishe ingekho - lesi isiphetho sabacwaningi baseMelika nabaseCanada, njengoba kubikwe yiThe New York Times.
Ososayensi abavela eNyuvesi yaseNorthwestern University e-Chicago kanye neSikhungo Sezempilo Yengqondo e-Toronto (CAMN) bameme amavolontiya wesilisa asemasha angu-101 ukuthi azofunda, kuwo angama-38 ayezibheka njengezitabane, ama-30 hetero- kanye nama-33 athanda ubulili obubili. Aboniswa amafilimu avusa inkanuko abonisa amadoda noma abesifazane futhi alinganisa izinkomba ezihlosiwe zokuzilolonga zokuvusa inkanuko.
Kuvele ukuthi labo ababezibheka njengabobulili obubili basabela ngendlela ehlukile kwabesilisa nabesifazane: izingxenye ezintathu kwezine zabo zibonise inkanuko ezimweni ezifanayo nezobungqingili, bonke abanye babengenakuhlukaniswa ngokwempilo kwabobulili obuhlukile. Ukusabela kobulili obubili akutholwanga nhlobo. Ngokukhanya kwale datha, ubulili obubili bubukeka njengokuzikhohlisa.