Tabbas mun lura cewa karen mu sunkuyar da kai lokacin da muke magana da shi, yin isharar da alama yana nuna sha'awar abin da muke faɗa. Gaskiyar ita ce, ba a san ainihin dalilin wannan kyakkyawar magana ba, kodayake akwai wasu ra'ayoyi game da shi. Suna nazarin dangantakar wannan yanayin tare da abubuwan motsawar da muryarmu ta samar a cikin dabba.
Wasu masana sunyi imanin cewa wannan motsi yana amsa niyyar saurare mu da kyau, don fahimtar kalmominmu (nazarin ya nuna cewa karnuka suna iya fahimtar ma'anar kusan 160). Nuna sha'awar muryarmu, saboda da wannan isharar suna barin daya kunnensu a bayyane.
Don haka yayi imani, misali, masanin ilimin canine Steven Lindsay ne adam wata, marubucin Manual na Aiwatar da Canine Halayyar da Training (2000), wanda ya ce: "A yayin da kare ya sunkuyar da kansa, yana kokarin gano kalmomi da sautin da aka sani, wadanda dabbar ke hada su da wasu ayyuka, kamar fita zuwa wurin shakatawa ko samun abin ci da za a ci." Masanin ilimin halayyar dan adam na Canine Alexandra Horowitz, marubucin A cikin tunanin kare (2011), shima yana goyan bayan wannan ka'idar.
Sauran masana suna jayayya cewa an tilasta karnuka don motsawa cabeza saboda hancinsu yana cire musu gani; karkatar da shi suna samun hoto mafi kyau na bakinmu. Ta wannan hanyar ya fi musu sauki su gane abin da muke so mu fada, tunda ko da ba su fahimci yarenmu ba, suna iya gane yanayin fuskar mutane.
Wannan ka'idar ita ce wacce mai binciken ya kirkira Stanley Coren, daga Jami'ar British Columbia (Kanada), sakamakon binciken da aka gudanar tare da taimakon karnuka 582. Daga cikin waɗannan, 60% sun girgiza kawunansu yayin da ake magana da su, kodayake wannan ya faru ne kaɗan tare da ƙananan ƙwayoyin cuta, kamar Bulldog ko Boxer.
El tabbatacce yanayin sharadi shima yana taka muhimmiyar rawa a cikin wannan lamarin duka. Yawancin lokaci muna ba da wannan kyakkyawan aikin tare da laushi da kyaututtuka, don haka karnuka sun ƙulla haɗa shi da lada. Wannan shine dalilin da ya sa suke ci gaba da yi, don jan hankalinmu.