I don't care who people feel attracted to, I care about what they do which affects public health. Anal intercourse (especially with multiple partners) is an inherently dangerous activity. Adding oral intercourse makes it worse.
Crossing the street's an inherently dangerous activity. Sex with disease-free people is every bit as safe as getting a blood transfusion from them. Type of sexual activity doesn't matter. Can't get anything icky from those that don't have anything icky.
Read this: Anal Sex Safety and Health Concerns
P.S. How do you know if a person is disease-free?