A study investigated ways in which masculine, feminine, androgynous, and undifferentiated individuals differed with respect to the importance placed upon receiver and sender characteristics as prerequisite conditions for self-disclosure. Subjects, 492 college students, completed a personal attributes questionnaire, which identifies individuals as masculine, feminine, androgynous, or undifferentiated, and a prerequisite condition survey, which asks respondents to indicate how important various conditions are in their decisions to self-disclose. Results showed that (1) masculine subjects saw receiver characteristics as significantly less important for self-disclosure than did feminine and androgynous subjects, (2) feminine subjects saw receiver characteristics as significantly more important than did masculine and androgynous subjects when the topic dealt with sexual activities, (3) masculine subjects viewed sender characteristics as significantly less important than did feminine and androgynous subjects, and (4) undifferentiated subjects placed more importance on an intimate setting as a condition for self-disclosure than did androgynous and masculine subjects. Sexual activities and achievement were revealed as unique and important topics about which people disclose, and psychological sex, or sex role, was shown to be more helpful than biological sex in understanding the prerequisite conditions for self-disclosure.A seven-page reference list and three tables are appended. (FL)