mpwaaz,
mimi nakuthibitishia ni HUMAN-BRAIN
sisi wenye watoto tunajua,kwasababu tumethibitisha kwamba:
-MTOTO WA KIKE(kablwa hajapevuka) anampenda zaidi baba yake mzazi kuliko mama
-MTOTO WA KIUME ni the opposite case.
amini usiamini,chanzo pale ni utofauti wa jinsia