Izixhobo zangaphakathi nangaphandle zokwenza iingcango zomlilo zetsimbi, nokuba yinto yokuzalisa okanye intsimbi yangaphandle, ikhethiweyo. Iimpawu zentsimbi yeengcango zomlilo zensimbi zingenza abantu bazive bekhuselekile kwaye bathembe ngokwengqondo iingcango zomlilo zensimbi ngakumbi.