Perhaps "vulnerability" and "susceptibility" are measured on a different scale? All stages of a relationship are susceptible to biases, but the beginning stages

Perhaps "vulnerability" and "susceptibility" are measured on a different scale? All stages of a relationship are susceptible to biases, but the beginning stages are the most vulnerable to destructive behavior arising from those biases.</nitpicking><!-- Yes this is exactly the kind of nitpicking that makes conversations awkward for us engineer types -->