Raws li kev lees paub ntawm "innateness" ntawm homosexual attraction, LGBT activists feem ntau hais txog kawm Neuroscientist Simon LeVay los ntawm 1991, nyob rau hauv uas nws liam tias nrhiav tau hais tias lub hypothalamus ntawm "homosexual" txiv neej yog tib yam li cov poj niam, uas supposedly ua rau lawv homosexuals. LeVay nrhiav tau dab tsi tiag? Qhov nws tsis pom qhov tseeb yog kev sib txuas ntawm lub hlwb qauv thiab kev sib deev proclivities.