Here, he appeals to the ways they instinctively know to do this as they pay special attention to the more vulnerable parts of their bodies (this is what Paul is alluding to in 12:23-24).
(Mit 28:15) Hambu lezvi Pawule a nga tiviwa na a tiyisa mabandla lawa a nga ma endzela, ka khati legi laha a nga hi paxweni hi yena a nga tiyisiwa. - 2Ko 13:10.