Mental disorders Depression Substance abuse Unprotected sex Etc... Homosexuals are subject to more than their fair share. Why? IMO: Lack of role models and support networks are the primary causes. Bullying can play part, but fact is many (most) homosexuals can avoid bullying by hiding their sexuality. But in this process, they lose the opportunity to gain a support network, to talk with people about their emotional and medical needs particular to their lifestyle. They lack role models and guidance. In their efforts to hide who they are, they isolate themselves what what support network they have, and they risk developing secretive, unguided, rebellious and unhealthy practices.