Hmmm. First off, were there controls with regards to the use of condoms? Yes, it is undeniable that the risk of contracting AIDS is drastically increased by unprotected anal sex, but what about the use of protection? Was this taken into account? Anyhow, let's say that there are highly effective condoms which prevent any unholy bodily fluids from being passed on.
There is still, perhaps, the issue of rectal damage, and a risk of incontinency, even rectal prolapse. However, if sufficient protection and due care is taken, the health risks should be minimal.
Even if it does affect the health of consenting adults involved, it is still their choice to engage in such activity.
Whether or not this should influence school policy, is uncertain. Perhaps it should be kept out of the curriculum until at the age of at least 16. Frankly, kids are being educated about sex and sexuality too early. It is illegal to engage in sexual activity until sixteen here anyway, and thus, the only education should be preventative, although some kids inevitably illegally experiment anyway. Preventative education can at least keep those numbers low. If these underage kids don't take the illegality into account, they probably won't use protection, either. However, a proportion of this sub-group will. Sadly, we can't completely stop underage sex, we can only reduce it to miniscule amounts. Portraying it as completely negative won't stop it altogether, as rebellious youngsters are often attracted by that which is taboo and condemned by adults. This might apply less to homosexuality, which is bound to draw abuse from other kids, but still.
There are so many adverts which say that smoking gives you all sorts of horrible diseases, but this makes it cool to some minors. You get the idea.
