Objective: To determine the relation of the European Male Ageing Study (EMAS) Sexual function questionnaire (SFQ) parameters in the groups of healthy (H) and type 1 diabetic (T1D) males and in groups of different ages and different centers of EMAS. Design and Method: The evaluation of EMAS SFQ of 204 persons: 82 H and 122 T1D patients was performed. The answers to the questions characterizing various domains of sexual activity were analyzed. Results: Results. Eight sexual parameters were counted. The ratio of H males (%) /40 - 49-year-old EMAS males (%) was above 1, except the frequency of erectile dysfunction which is very low in the group of H males and extremely high in the group of T1D males. The results were similar when the 50 - 59-year-old EMAS group was taken in comparison to H males. The H males group shows even more clear predominance while T1D males are similar to 50 - 59-year-old EMAS males. Comparing the results of H males and EMAS males from various centers the rarity of H erectile dysfunction and higher frequency of masturbation become apparent. Other parameters do not show difference in comparison to EMAS centers. Conclusions: Conclusions. The sexuality of H males is above the one of EMAS 40 - 49-year-old males, while the sexuality of T1D males is similar to the sexuality of EMAS 50 - 59-year-old males. The erectile dysfunction is rare and the frequency of masturbation is higher when H males are compared to the various ages EMAS males from different centers.