Young and older homosexual men in four countries (Sweden, Finland, Ireland, and Australia) were compared on a number of psychological, social, and psychometric indices to determine what differences existed between them, and the effect of culture on any such differences. Data show that there are greater differences between younger and older homosexual men as the culture appears more antihomosexual, and that younger homosexual men are less likely to accept their sexual orientation and more likely to accept myths surrounding homosexuality. Younger homosexual men were also more likely to have had gonorrhea (regardless of their number of sexual partners), to prefer receptive anal intercourse, and to have contacted partners by cruising. These data confirm that mental health consequences of antihomosexual environments are most negative where homosexuality is most severely stigmatized.