Interesting..

Up until recently, I was chairman of a PCT, the funding authorities of NHS provision. Your figures don't seem to accord with public health figures nor indeed risks.

Sexually transmitted diseases have risk groups based on lots of factors and the epidemiology is too complex for either your assertion nor indeed for any rebuttal. That said, the highest risk STD is chlamydia and the largest risk group is women between 14 and 26.

In the meantime, HIV through homosexual sex is, nationally, far lower than HIV through needle exchange and only slightly higher than heterosexual sex transmission. (Source; DH - The State of Public Health in England 2011.)

That is not to gloss over the fact that homosexual transmission risk is there, exists and whilst nowhere near the levels prior to health education in the mid '80s, has not been eradicated yet.

Your statistics, whilst cherry picking at best and erroneous at worst, would be, if taken on merit, a good reason to promote gay marriage, as marriage should be, under most circumstances, a lowering of promiscuity in any lifestyle group.

Perhaps the Cardinal too should be promoting public health rather than promoting stigma and shame on a whole section of society? I expect no less from you, as your anonymity allows your free speech to exist without responsibility, but a Cardinal is set up by his followers to commentate on the state of society, and his insistence on bringing historical bigotry to the table does him no favours at all.