From a secular standpoint it is unnatural to go anal. It does no benefit to the species but gratifies perverse, selfish urges. The disease rate is astronomical. The suicide rate is astronomical. The rate of INCEST/RAPE is astronomical.
From a disease standpoint: The two holes that possess extreme volumes of nasty bacterial and viral flora are the mouth and the anal canal. The rate of STDs among homosexuals and lesbians are unusual in content and volume around the mouth, throat, and anus region, with unusually high probability of disease in all areas with bi-sexual women.
Finally, homosexuals and lesbians CANNOT REPRODUCE. THEY RECRUIT. Which is the sole reason why the radical homosexual agenda seeks to undermine the family and societal agencies that allow interaction between adults and children (Boy Scouts, Girl Scouts, religion, schools) without protection. They vigorously seek to overturn age of consent and sodomy laws. They also seek to destroy the idea of involuntary sex (rape for those in Rio Linda).
To quote Adam Carolla and Dr. Drew during a recent irreligious Loveline program
Adam: "I'm tired of hearing these new PSAs during AIDS AWARENESS that say that homosexual sex is the same as hetero-sex. Wait, Drew, is it all the same?
Drew: "They say it's all the same."
Adam: "Really? but Drew is it really all the same to you?"
(Drew discusses the diseases and ramifications of a homosexual lifestyle that I just highlighted).
Adam: "Yeah but this is what I'm saying...Drew when you think of all the straight people that died from AIDS, who comes to mind?"
Drew: "Ummmmm. No one?"
Adam: "No, there's got to be someone, because it's all the same Drew. That's what the PSA says. Straight people are dropping like flies."
Drew: "Uh huh. I know what the PSA says. Ummmmm. No one"
Adam: "PSA's don't lie, Drew! How about Freddie Mercury?"
Drew: "He was gay."
Adam: "No, really? Yeah but still, its all the same kind of sex. NO IT'S NOT THE SAME!!!"