Mu buzima bwa buri munsi, hakunze kugaragara imyitwarire igaragaza ko abagabo benshi bashimishwa no kwegera cyangwa gukora ku bice bimwe by’umubiri w’abagore, cyane cyane amabere n’ikibuno.
Abashakashatsi mu by’imitekerereze ya muntu n’imikorere y’umubiri bavuga ko ibi bifite ibisobanuro bifitanye isano n’ubumenyi bwa siyansi, imiterere karemano y’umuntu ndetse n’umuco.
Icya mbere, inzobere zigaragaza ko gukora ku mubiri w’umuntu ukunda bituma ubwonko burekura umusemburo witwa dopamine, uzwiho gutera ibyishimo no kumva umuntu yishimiye ibyo ari gukora. Ibi bituma uwo muntu yumva arushijeho kwegera uwo akunda, bikongera amarangamutima y’urukundo n’inyiyumvo zo kwiyumvanamo.
Ikindi kandi, mu rwego rw’imiterere karemano (biology), hari abahanga bavuga ko abagabo bashobora gukururwa n’ibimenyetso by’umubiri byerekana ubuzima bwiza n’ubushobozi bwo kororoka.
Amabere n’ikibuno bifatwa nk’ibimwe mu bice by’umubiri byagiye bifatwa nk’ibigaragaza imbaraga z’ubuzima n’ubushobozi bwo kubyara, nubwo ibi bidafite aho bihuriye n’ukuri ku bantu bose ku giti cyabo.
Gusa nanone, abasesenguzi b’imibanire y’abantu bibutsa ko imyitwarire nk’iyi igomba kujyana n’icyubahiro n’ubwumvikane hagati y’impande zombi. Gukora ku mubiri w’undi muntu bigomba kuba bikorwa gusa igihe hari ukwemeranya no kubahana, kuko uburenganzira ku mubiri ari ingenzi kuri buri wese.
Nubwo hari ibisobanuro bya siyansi n’imiterere karemano bishobora gusobanura impamvu abagabo bamwe bagira iyi nyiyumvo, imyitwarire myiza ishingira ku kubahana, ubwumvikane n’indangagaciro z’imibanire myiza hagati y’abantu.