Ua maʻa ka honua i ka pili ʻana o kekahi i nā kāne, ʻo kekahi i nā wahine, a ʻo kekahi i nā kāne ʻelua. ʻOiai ʻaʻole i loaʻa ka koho hope loa - ʻo ia ka hopena o nā mea noiʻi ʻAmelika a me Kanada, e like me ka hōʻike ʻana e The New York Times.
Ua kono ʻia nā kānaka ʻepekema mai Northwestern University ma Chicago a me ka Center for Mental Health ma Toronto (CAMN) i 101 mau kāne ʻōpio manawaleʻa e aʻo, a he 38 i manaʻo iā lākou iho he kāne kāne, 30 hetero- a me 33 bisexual. Ua hōʻike ʻia lākou i nā kiʻiʻoniʻoni erotic e hōʻike ana i nā kāne a i ʻole nā wahine a ua ana ʻia nā hōʻailona physiological o ka hoʻāla ʻana.
Ua hoʻololi ʻia ka poʻe i manaʻo iā lākou iho bisexual reacted ʻokoʻa i nā kāne a me nā wahine: ʻekolu hapahā o lākou i hōʻike i ka hoʻoulu ʻana i nā hihia like me ka homosexuals, ʻo ke koena i physiologically indistinguishable mai heterosexuals. ʻAʻole i ʻike ʻia nā hopena bisexual. Ma ka malamalama o keia mau ikepili, bisexuality like me ka hoopunipuni iho.