This study compares sexual activity and sexual and marital satisfaction in spinal-cord-injured (SCI) and diabetic men who had received either a penile prosthesis or papaverine/phentolamine injections for the treatment of impotence. Questionnaires were used retrospectively to assess changes pre- and post-procedure in 30 SCI and 26 diabetic males. Regardless of whether they received a penile prosthesis or injections, both diabetic and SCI males reported increases in diversity and frequency of sexual activities and satisfaction with sexual activities post-implant/injection. When compared with a normative sample, both diabetic and SCI males were found to have poorer body image post-implant/injection. They also reported more disagreement with their partners but engaged in more activities together. © 1992.