The purpose of this research was to investigate moral reasoning relate
d to sexual behavior that could lead to the transmission of sexually t
ransmitted diseases (STDs). Using hypothetical dliemmas about situatio
ns in which STDs can be transmitted, respondents were asked to explain
why they believed the characters should or should not engage in risky
behaviors. 40 college freshmen (M = 18.3 years) and 32 college senior
s (M = 22.3 years) participated. Using Kohlberg's moral stage theory a
nd Gilligan's moral orientation model, the interviews were scored for
moral stage and moral orientation. Results indicated that the older ag
e group had a significantly higher stage of moral reasoning than the y
ounger age group when responding to dilemmas about STDs. There was a s
ignificant difference in moral stage between dilemmas, reflecting the
possible effect of dilemma content on moral reasoning. The overall pat
tern of result shows nonsignificant gender differences in stage of mor
al reasoning and moral orientation. Clinical and theoretical implicati
ons of these findings for understanding the role of moral reasoning in
sexual risky behavior are discussed.