The freak out about BB is an American thing. In other countries I've been to, people don't get their panties in a twist about BB. I compare it to the movie "Reefer Madness". The politically correct message on BB is that if you do it, you're as good as dead. The truth is, the chances of a heterosexual male who engages in insertive vaginal sex, the chance contracting HIV is 1 in 2500 (0.0004%). The chances are 1 in 1250 (0.0008%)for women. That's not just from one study, that's from multiple independent studies. But if you go on TV and say that, you'd be accused of downplaying the threat.
The most risky sexual activity, receptive anal sex has a rate of 1.4%. In that regard, Truvada has been shown to prevent HIV transmission. A study released last week showed that in a trial of 600 gay men over 2.5 years, the HIV infection rate was 0%. Not a single infection among the highest risk group. If you have good insurance, Truvada is $200 a month. Without insurance it's $1400 a month because in America, sickness and death is something to profit from. In Kenya, a prostitute can get it for free. Truvada can prevent infection if taken within 3 days of suspected exposure.
https://www.washingtonpost.com/news/...ent-effective/
People are ignorant when it comes to disease transmission and are good about repeating the fear based messages and anecdotes they've heard. Ignorant people say things like, if HIV gets in your bloodstream, you have it. That's not completely false, it's not completely true either. There are plenty of documented cases of gay bottoms and needle users not contracting HIV.
Common sense helps, avoid sex with people that have legions, rashes, and other unusual skin conditions. Avoid sex with women discharging white or gray fluid, or have an unusually strong odor. Sex Education in America sucks, the schools I attended here barely touched on it. In England, it was treated like a real class. We saw various pictures of genitals and faces of people with STDs so we'd recognize symptoms when we saw them. Here idiots want to teach abstinence.