Akukho mahluko ngenene: i-bushing luhlobo oluthile lokuthwala.Ngokuqhelekileyo, "ukuthwala" kuququzelela ukunyakaza phakathi kwamacandelo amabini ngelixa unciphisa ukungqubuzana.Uyilo olulula, ukuthwala okuqhelekileyo kunemiphezulu emibini eqengqelekayo enye kwenye, ivumela izinto ezimbini zokukhwelana ukuba zishukume ukukhuhlana-kancinane.